In our solar system, only one planet is blessed with an ocean: Earth. Our home world is a rare, blue jewel compared to the deserts […]

The post Astronomers discover two water worlds orbiting star Kepler-62 appeared first on Smithsonian Insider.

In June, Odile Madden, materials scientist at the Smithsonian’s Museum Conservation Institute, was a participant on a 6-day interdisciplinary expedition to a number of beaches […]

The post Q&A: Plastics expert Odile Madden on plastic debris in Alaskan waters appeared first on Smithsonian Insider.

A groundbreaking study by Harvard University’s Harvard Forest and the Smithsonian Conservation Biology Institute reveals that, if left unchecked, recent trends in the loss of […]

The post Sprawl threatens water quality, climate protection, and land conservation in Massachusetts appeared first on Smithsonian Insider.

As the male túngara frog serenades female frogs from a pond, he creates watery ripples that make him easier to target by rivals and predators […]

The post Bats use water ripples to hunt frogs appeared first on Smithsonian Insider.

Mention coral reefs and images like snorkeling, tropical fish and sunny island getaways pop to mind. Vacation packages are not being offered, however, for many […]

The post Cold, dark and lonely: Deep-water corals thrive where the sun never shines appeared first on Smithsonian Insider.

A new water frog from the Pacific slopes of the Andes in central Peru has been described and named in the open access journal ZooKeys. Telmatobius […]

The post New species of bright-yellow water frog discovered in Peru appeared first on Smithsonian Insider.

How soon after the Big Bang could water have existed? Not right away, because water molecules contain oxygen and oxygen had to be formed in […]

The post Water may Have Been Abundant in First Billion Years after big bang appeared first on Smithsonian Insider.

It is a simple solution to a wildlife water shortage. During the annual dry season [November through April] in a protected forest in eastern Cambodia, […]

The post This simple trick helped fix a wildlife water shortage in Cambodia appeared first on Smithsonian Insider.

If you were dumped into the middle of a desert, your first instinct would be to look for water—it is, after all, the stuff of […]

The post In Western China’s deserts an ancient competition for water resumes appeared first on Smithsonian Insider.

The world’s most indestructible species, the tardigrade, an eight-legged micro-animal, also known as the water bear, will survive until the Sun dies, according to a […]

The post Study determines microscopic water bears will be Earth’s last survivors appeared first on Smithsonian Insider.

Tidal Freshwater Wetlands focuses on wetlands found in North America and Europe near the mouths of rivers that flow into estuaries like the Chesapeake Bay.

The post New book reveals tidal freshwater wetlands are on frontlines of global change appeared first on Smithsonian Insider.

To understand the long-term effects of a prolonged tropical storm in the Panama Canal watershed, Robert Stallard, staff scientist at the Smithsonian Tropical Research Institute and research hydrologist at the U.S. Geological Survey, and Armando Ubeda, the LightHawk Mesoamerica program manager, organized four flights over the watershed to create a digital map of landslide scars.

The post Smithsonian hydrologist discovers that rainfall has dried up Panama’s drinking water appeared first on Smithsonian Insider.

George Smith, a marine biologist at the Smithsonian Environmental Research Center, explains his work of finding ways to prevent invasive species from being released in Baltimore Harbor in the ballast water of large ships.

The post Preventing ballast-water invasions of alien species appeared first on Smithsonian Insider.

The post Belize’s South Water Caye Marine Reserve protects biodiversity of Belizean Barrier Reef appeared first on Smithsonian Insider.

The Smithsonian Environmental Research Center in Edgewater, Md., and the Alaska Sea Grant Program of the University of Alaska, Fairbanks, were recently identified as the […]

The post Smithsonian scientists to help identify and eradicate invasive species in Alaskan waters appeared first on Smithsonian Insider.

Shallow-water seagrasses can’t survive without enough light. And fish, shrimp, crabs and other creatures we rely on for food can’t survive without seagrasses. Smithsonian biologist […]

The post Ecosystems on the Edge: Underwater Light and Seagrass appeared first on Smithsonian Insider.

A tiny invasive insect from Asia might have an effect on Chesapeake Bay waters. The emerald ash borer is killing millions of ash trees in […]

The post Invasive ash borer found in Smithsonian Environmental Research Center forest; ash deaths may impact Chesapeake waters appeared first on Smithsonian Insider.

Radon in household water supplies increases peoples overall exposure to the gas, but waterborne radon poses few risks to human health, says a new report by a committee of the National Research Council.

The federal government should not increase the maximum level of copper allowed in drinking water, because higher levels could lead to liver poisoning in infants and children with certain genetic disorders.

The vast majority of healthy people adequately meet their daily hydration needs by letting thirst be their guide, says the newest report on nutrient recommendations from the Institute of Medicine of the National Academies.

The U.S. Environmental Protection Agencys standard for the maximum amount of fluoride allowed in drinking water -- 4 milligrams of fluoride per liter of water -- does not protect against adverse health effects.

Evidence exists that people who lived or worked at Camp Lejeune Marine Base in North Carolina between the 1950s and 1985 were exposed to the industrial solvents tricholorethylene (TCE) or perchloroethylene (PCE) in their water supply, but strong scientific evidence is not available to determine whether health problems among those exposed are due to the contaminants, says a new report from the National Research Council.

The numerous technical and operational breakdowns that contributed to the Deepwater Horizon oil rig explosion and spill from the Macondo well in the Gulf of Mexico suggest the lack of a suitable approach for managing the inherent risks.

Hydraulic fracturing has a low risk for inducing earthquakes that can be felt by people, but underground injection of wastewater produced by hydraulic fracturing and other energy technologies has a higher risk of causing such earthquakes, says a new report from the National Research Council.

Over the next several decades as the global population grows, society will be faced with pressing challenges such as providing reliable supplies of food and water, diminishing climate change and adapting to its impacts, and building healthy, resilient cities.

A new report from the National Academies of Sciences, Engineering, and Medicine offers guidance to the U.S. Environmental Protection Agency to inform the next revision of a permit program that requires industries to manage stormwater to minimize discharges of pollutants to the environment.

The supercritical water oxidation (SCWO) system is a secondary waste processing reactor of the Blue Grass Chemical Agent Destruction Pilot Plant (BGCAPP). It is perhaps second in importance behind the agent neutralization reactors, which perform base hydrolysis of chemical warfare agents stored at the Blue Grass Army Depot.

Dried and cracked earth is visible on an unplanted field at a farm on April 29, 2014 near Mendota, California. ; Credit: Justin Sullivan/Getty Images

• Summer is upon us, and KPIX in San Francisco reports three years of drought in the Central Valley has turned America's salad bowl into a "dust bowl." (KPIX)
• Speaking of summer and San Francisco, it appears denizens of the City by the Bay have done such a good job of conserving water, their water agency has already decided there will be no mandatory restrictions this summer. (San Jose Mercury News)
• Meanwhile, SFGate columnist Mark Morford wonders how water availability will factor into property values for summer get-aways north of San Francisco:

Wait, what? Right, the water. The Looming Issue. The Unexpected Fear. Water – or rather, the potential lack thereof – is something I didn’t realize I’d be quite so worried about when I started my search. But now? It’s damn near unavoidable. (SFGate)

• "As the Water Bond Turns" continues in Sacramento. In the latest episode, Gov. Brown stops playing hard to get and decides to commit, but will he find a willing (political) partner? Stay Tuned. (Sacramento Bee)

This content is from Southern California Public Radio. View the original story at SCPR.org.

; Credit: Beatrice the Biologist / Scientific American

Today's dryku:
Food budgets are tight
Droughts do raise vegetables' price
But don't make snakes bite

Food:

• The USDA released its monthly food price outlook. Looks like prices are going to be up at least 3.5%. Fresh fruit could go up by 6%. Bloomberg has a chart showing how produce is projected to hit its highest price in 18 years. (LA Times)

Critters:

• Southern California seems to be seeing a higher rate of rattlesnake bites this year. Despite the article's headline, experts in the story say it's not because of the drought. A shorter winter has brought snakes out of hibernation earlier, meaning a longer active season, meaning more need for anti-venin.

As of June 12, 128 people were admitted to a hospital for a snakebite and of those, 93 received doses of anti-venin, Heard said. In 2013, 269 Californians went to a hospital for a snakebite and of those, 166 received anti-venin, he said. Simply doubling the number of patients needing anti-venin treatment would equal 186, more than 2013. (Some patients get “dry bites” meaning no venom is injected and therefore do not need anti-venin, he said). (Contra Costa Times)

• It's been a mixed bag for salmon this year. Some have needed to be trucked out to the ocean, because their streams are too dry. In the case of coho salmon, the drought has actually caused a record number to enter the ocean. It's not all good news though:

Biologists say that only 206 salmon egg clusters, known as "redds," were counted in the Lagunitas this year, well below the 20-year average of 250 "redds." And the fish that headed off to the ocean may not fare as well. They are smaller than normal and could face more difficult ocean conditions due to the warming pattern known as El Niño, scientists say. (Chico Enterprise-Record)

Fireworks:

• Sacramento cops are out in force, looking for illegal fireworks. The sheriff's department will double its number of officers on the hunt. Starting this week, having the little fire starters can mean jail time. (CBS Sacramento)

Water jerks:

• Everyone seems to be at a loss on how to get people to start saving water. Beatrice the Biologist may have stumbled onto the answer — it's a mixture of shame and badges. I'm going to print out the car one and post it in my window. Maybe then people will stop judging me for my filthy Camry. (Scientific American)

How has your community been affected by the drought? Share your story with a photo on Twitter or Instagram. Tag it #mydrought. For more details on our photo project, click here.

This content is from Southern California Public Radio. View the original story at SCPR.org.

This is a public service campaign suggesting you save water...and suggesting some other things too. ; Credit: SFPUC

Friday's news is going to make you wait for it...when it comes to an explanation for the picture above.

The Wall Street Journal takes on pricing and other big-think policies that various authors claim are worsening the drought.

• Those higher food prices Jed wrote about yesterday? Alyssia Finley, assistant editor of OpinionJournal.com, says they're the fault of environmentalists, and higher food prices will be the way the rest of the country will pay for California's "green sanctimony." (WSJ)
• Economist Edward Lazear argues that "government-dictated prices, coupled with restrictions on the transfer of water, have made a bad situation much worse." He takes aim at the state's limitations on water transfers (lifted, he doesn't note; but he argues that pricing distorts the need for transfers anyway). He argues that public agencies that protect environmental conditions with water should pay for the privilege:

Although there may be good reasons to ensure that some fish and wildlife be protected, we should not pretend that this protection is costless. Agencies that divert water for environmental purposes should be required to budget explicitly for the lost revenue associated with the decision to divert it for this purpose, rather than allowing it to be sold at the market price for urban or agricultural use. (WSJ)

...and he argues that farmers, who might have to pay more for water on a more-open market, should get extra money to help them transition to the free market.

• Cato loves Lazear's arguments, and offers one amendment. Chris Edwards wants the federal government to get out of the water business, and in California, to hand over the Central Valley Project to the state. (Cato)
• In other business news, it's going to be a mixed bag for boat businesses at California recreation areas this summer. They're nervous in Tahoe, but overall expect to benefit from Folsom Lake's bad year. (TradeOnly Today)
• CNN gets into the Firehawk, which is a U.S. Army Black Hawk helicopter with a giant water tank on it. L.A. County owns a few. They're going to be busy this summer, thanks to the drought. (CNN)
• And finally, in a move that reminds me of the time I wanted to name this blog "Hot, Wet, Climate Action," the San Francisco Public Utility Commission has a new, sexy (or is it sexxy?) campaign to conserve water, with words like "QUICKIE" and "DOING IT" popping out of copy alongside minimalist pictures of pieces of water plumbing. My favorite is "DIRTY HANDS" with its faucet shot to look like a piece of anatomy. (SFPUC)

VIDEO: Get paid for doing it nice!

How has your community been affected by the drought (besides getting more suggestive ads about jiggling the toilet handle)? Share your story with a photo on Twitter or Instagram. Tag it #mydrought. For more details on our photo project, click here.

This content is from Southern California Public Radio. View the original story at SCPR.org.

Less water in Hoover Dam means less power coming from the Dam's generating units. ; Credit: Dawn Danby/via Flickr

Monday's fat stack of news also includes some views about what to do about drought and Western water supplies.

The New York Times has published six answers to the questions "What are the best ways to share the water? And how can we ensure it lasts for the foreseeable future?" Pat Mulroy, former general manager of the Southern Nevada Water Authority, weighs in, as do several other think tankers:

[N]ew energy and fuel production options have become more water intensive. Unconventional oil and gas production methods such as hydraulic fracturing have significant implications for local and regional water quality and quantity. Bioenergy consumes water at various stages of production (including irrigation for crops) and also has impacts on water quality and quantity...We should be pursuing cleaner energy and streamlined approaches to conserving water in order to truly safeguard our water supply. (Newsha Ajami/Stanford University)

An incredible 40 percent of the water consumed by Americans goes into meat and dairy production. Livestock must drink water and there is some water use at the farm, but most of this water is for the producing animal feed...Is this a wise allocation of the limited supply of freshwater in America? (Arjen Hoekstra/University of Twente, Netherlands)

• Closer to home, the Sacramento Bee has an ongoing series about drought solutions. Mariposa County resident Tom DeVries, who lives in forestland at 4,000 feet, offers his take:

Trees take water; a big one can draw 100 gallons a day out of the ground. All that junk forest in California is sucking up water that should be filling my spring and well and flowing downhill toward the rest of you. (Sac Bee)

• You know who else has good ideas about how to conserve water in drought? Australians. (KQED)
• Jay Lund from UC Davis modeled a "mega-drought" with his team and found that the economic consequences of a big drought event could be mostly managed through smarter water conservation policies. (California Water Blog)
• Falling water levels at Lake Mead are lowering Hoover Dam's energy production. Generating units have recently been "derated," meaning that they're expected to have a lower capacity for producing electricity now that there's less water to turn turbines. (EE News)
• Jason Dearen and Garance Burke report on "senior rights holders," and how poorly California accounts for water use by people who have rights dating back before 1914 at anytime, and how much that matters now during the drought. (AP)
• You're gonna see a lot of these stories all week: it's a terrible year for setting off fireworks. I bet rural fire chiefs have their teeth on edge already. (Merced Sun-Star)
• And we'll finish up in Southern California. In the first of a duo of Dana Bartholomew stories, the Daily News reports on Turf Terminators, a company that offers to leverage the recently-raised turf removal incentive and swap out homeowners' lawns for less thirsty landscapes...essentially for free, since the company's premise is that it can do the work for the price of the rebate. (Daily News)
• In the second, Bartholomew profiles a Studio City water-conservation demonstration at homes along Rhodes Avenue. (Daily News)
• And a UCLA project examining water use and conservation potential in territory served by the Los Angeles Department of Water and Power suggests that we're not pricing water well enough to encourage conservation. Authors of a policy brief with the California Center for Sustainable Communities say dual metering, for inside and outside, would also improve conservation. (Imperial Valley News)

How has your community been affected by the drought? Share your story with a photo on Twitter or Instagram. Tag it #mydrought. For more details on our photo project, click here.

This content is from Southern California Public Radio. View the original story at SCPR.org.

A 1962 Thousand Oaks survey picture of H.L. Hall Water Well and Test Hole Drilling, and Aitken and Kidder Water Development, by Pat Allen. Water well drilling goes back a century in California, but records are scarce for public viewing.

Monday's news is nosy about your neighbor — and your neighbors' groundwater drilling.

• More great reporting from the Sacramento Bee on anachronistic problems of transparency in how we manage water in California. Even some well drillers now favor more transparency for groundwater "well logs":

In all other Western states, such records are accessible to whomever wants to see them – from university professors to civil engineers, real estate agents to the media. But in California, well logs are barred from public inspection by a 63-year-old law written to keep data gathered by well-drilling companies from falling into the hands of competitors. “The lack of information about well logs makes no sense, particularly as we are trying hard to manage a diminishing public trust resource,” said Jeffrey Mount, senior fellow at the Public Policy Institute of California, a nonpartisan think tank in San Francisco. “This is another one of those anachronistic statutes that does not belong in a modern water management system,” Mount said. (Sacramento Bee)

• Nearly 90 percent of the $700 million in "emergency drought relief" money authorized by the governor a few months ago is yet to be spent. But, as our public radio colleague Ben Adler reports, that's not necessarily as bad as it sounds. Grants take time. (Capital Public Radio)
• The secret new trend in water district conservation isn't cops, it's guys who make "water-wise house calls":

One out of every four households has a leak of some sort, usually something as simple as a loose toilet flapper, [water district spokeswoman] Figueroa said. "Leaks are common," she added. "Don't be embarrassed." (SJ Mercury News)

• The New York Times reports on how Californians are tracking their neighbors' usage deep into the drought. Ian Lovett explores Twitter-based shower-shaming (a phenomenon this blog noticed some months ago), ratting your neighbor out for violating restrictions and other guilt-based behavioral nudges. About our region, he writes:

Most homes in Southern California have already been outfitted with efficient shower heads, toilets and garden hoses, making it harder for residents to significantly reduce their water consumption than it was during the last severe drought a quarter-century ago. (NYT)

And how has your community been affected by the drought? Share your story with a photo on Twitter or Instagram. Tag it #mydrought. For more details on our photo project, click here.

This content is from Southern California Public Radio. View the original story at SCPR.org.

When it comes to water usage, not all car washes are created equal. Most car washes don’t recycle water, but more and more newly built car washes are starting to. Santa Ana Express Car Wash opened three years ago and its million-dollar equipment recycles 70 percent of its water.; Credit: Maya Sugarman/KPCC

Washing your car with a garden hose can use up to 120 gallons of water. Most corner conveyor belt operations use less, but all that water can add up, as we told you in August.

That’s why the group LA Waterkeeper is challenging motorists to drive dirty and pledge to skip car washes for 60 days. 

"Water conservation is the easiest and most affordable way to quickly reduce water demand and also extend supplies into next year," says Liz Crosson, the group's executive director. 

This summer Ventura County’s water agency asked people to skip washing their rides for a month; some people got detailing and car washes as a reward. Crosson’s group is hoping bragging rights will be enough of an incentive. (Though there are some as-yet-undisclosed prizes.)

People who live in LA are really excited and interested by the cars that they drive," Crosson says. "And frankly, you can have a dirty car and you can have a sticker and have an excuse for having a dirty car so it saves your image too."

The campaign’s just kicking off this weekend (at the Abbott-Kinney festival), but Crosson’s already optimistic for success. Early adopters of the pledge are hundreds of people from the online site Reddit and the general manager for the Los Angeles Department of Water and Power.

GO DIRTY FOR THE DROUGHT. Take the #DirtyCarPledge to not wash your car for 60 days. Ready, Set, Go Dirty! http://t.co/TsxdvsgpCv

— LAWaterkeeper (@LAWaterkeeper) September 25, 2014

From the ED, I’m Molly Peterson, 89-point-3. KPCC.

This content is from Southern California Public Radio. View the original story at SCPR.org.

What once were orchards and citrus groves now is a dense but sprawling urban area. The city of Los Angeles is considering ways to capture stormwater near where it falls so that water can be made use of throughout the city. ; Credit: Los Angeles Department of Water and Power

With a historic drought showing no signs of letting up, the city of Los Angeles is drafting a new plan to use more local water sources by capturing storm water throughout the L.A. basin. At recent community meetings, officials from the Department of Water and Power (along with the city's Sanitation Department) have been showcasing potential ideas for the final plan, due out this summer.

This new plan would make storm water about 4 percent of the city's annual water budget. For the first time, LA is talking about making storm water a small but reliable part of the city’s water sources – 25,000 acre-feet, or somewhat over 8 billion gallons of storm water a year. For perspective, a typical one-inch rain event in Los Angeles County produces more than 10 billion gallons of storm water, most of which hits asphalt and concrete, flows into storm drains and goes to the sea.

It’s hardly a new idea. But storm water capture has taken on additional urgency because of the drought, because of the increasing price of importing water, and because of local water quality rules.

On top of that, Los Angeles Mayor Eric Garcetti issued an executive order last October, directing the LADWP to cut its purchase of imported water in half within a decade, in part by cutting water consumption at least 20 percent.

Storm water capture projects have captured the energy and attention of environmental groups who’ve demonstrated them in backyards, neighborhoods, and alleyways.

LA could invest in much-larger-scale versions of those ideas. Good places for those bigger projects tend to be in the San Fernando Valley, where the geology is hospitable to rain water capture and the city has clearest rights. 

Some examples featured in the LADWP’s presentation aren’t yet approved, but are in consideration:

• Water capture and storage at the Van Norman Complex; 
• The Canterbury Power Line Easement, running between the Tujunga Spreading Grounds and the Pacoima Wash, which would capture 1500 acre-feet of water a year; and 
• Converting Strathern Park (near the Hollywood Freeway) from a disused gravel pit/landfill to a wetlands park, in joint operation with L.A. County. 

Storing storm water in the ground means protecting some areas from industrial pollution, and means filtering and treating polluted groundwater as it’s pulled from aquifers. Last November’s $7.5 billion dollar water bond earmarked funds for storm water capture and for groundwater cleanup. DWP officials say they’re hoping to bring some of that money to Los Angeles.

This content is from Southern California Public Radio. View the original story at SCPR.org.

At the corner of Glendale and Glenfeliz, Jeff Harmes created an art garden completely from scratch. ; Credit: Alana Rinicella

On the median on the Atwater Village side of the Hyperion bridge, Jeff Harmes built a garden. It's an act he calls "taking nothing and making it into something that everyone can get something out of, that can inspire everyone."

Having lived on the streets for 30 years, Jeff says grew to hate litter. He used to sweep street gutters with a piece of cardboard and remove trash packed into the forks of trees. He thought of them as small acts that would go mostly unnoticed.

On a whim last spring, he started tilling the median — or "the island," as he likes to call it ... although "oasis" is more like it, now. He made rock sculptures from stones he scrounged out of the L.A. River. In celebration of spring, he made a peace sign out of flowers. 

He says he doesn't know much about gardening or landscaping. He learns as he goes and looks to commuters for suggestions. In the absence of running water, he relies on rainfall.

Vibrant succulents sit next to kitschy items like gnomes and plastic flamingos. Intricate formations of seashells and stones contrast starkly against the neatly patted dirt. A young girl even donated her seashell collection for the peace sign. 

Recently, though, a vandal smashed the peace sign and wrecked Jeff's plants, including his squash crop. With help from the neighborhood, Jeff has been able to rebuild the garden. New plants have sprouted and the stonework has been repaired.

Jeff says his new goal with the garden is for people to draw something positive from it. "I want hate to be transferred into something beautiful," he said. Moving forward, he hopes to expand it down the island. 

(Note: This post has been edited. The original called it a "meridian," which is an invisible geographic line. "Median" is correct.)

This content is from Southern California Public Radio. View the original story at SCPR.org.

Freshwater from salt water using only solar energy

Access to water is often described as a basic human right, so rights violations may be committed where corporate activities interfere with individuals' access to water. Water supply is generally the responsibility of government, but recent Dutch research has suggested that corporate social responsibility (CSR) can have a significant impact on the sustainability of freshwater supply in countries with weak governance regimes.

Organophosphates (OPs) used to protect materials from fire and in other industrial processes have affected the quality of groundwater, particularly in urban areas and near landfill sites, according to recent research.

A new study indicates that water management in the Netherlands uses a reliable warning system for extreme weather, which can incorporate wind and coastal surge level forecasts, as well as precipitation forecasts.

A new Spanish study has highlighted current developments in the tourism sector that have significant implications for water supply and demand, but are barely addressed in recent land use policies. The findings indicate that any tourist destination that is to follow the ???quality tourist??? model will have an increased water demand in domestic residential areas, which is one of the biggest threats to sustainable water management.

A recent study compared the decentralised treatment of pharmaceutical contaminants in wastewater at hospitals with centralised treatment at conventional and upgraded wastewater plants. The results suggest that additional (post) treatments may not always provide significant benefits.

Blue-green algae, or ???aquatic cyanobacteria???, can produce harmful toxins and present a serious health hazard when they bloom in large numbers. Researchers from Germany have now identified plant species that could be used to sustainably treat water by removing such cyanobacterial toxins.

A recent study has revealed how water use has changed across the world over the last 60 years. Growing populations and economic development, particularly in newly-emerging countries, have increased water demand, but technological developments have led to water efficiencies and savings, which moderate these demands.

Green roofs can cool buildings in summer and prevent heat loss in winter. A new study suggests, however, that in the warm climates of southern Europe the additional cost of watering means that 'cool roof coatings??? may be more cost effective.

Urban water use increases with a population’s average income, finds a study of a stressed river basin in Spain. Consumption also increases with population age, but falls as education levels rise. Such information could help municipal water providers predict future water trends and to develop appropriate measures by which to manage demand. There is huge interest in mining polymetallic nodules in deep-sea environments. These bumpy rocks on the seafloor contain highly valuable materials including manganese, iron, cobalt, nickel and copper.

A circular economy, in which waste is minimised and resources are kept within the system, relies upon inventive ways of turning waste into a resource. A new study explored the possibility of using the microalga Scenedesmus obliquus to refine and process brewery wastewater. The alga efficiently removed pollutants from the effluent, produced biomass and biofuels in a range of different forms — and with different bioactive compounds — and encouraged waste barley and wheat to germinate at increased rates. This is especially important for breweries, as barley seeds are one of the main feedstocks for the industry — and thus are key to increasing its sustainability and circularity.

How can we grow more crops without taking too much water away from freshwater ecosystems for irrigation? A new study indicates that it is possible to double crop production by 2050 without exceeding set limits for water extraction if more crops are grown in regions with higher rainfall and with corresponding shifts in international trade and agricultural management. However, without appropriate safeguards, and if we follow the current business-as-usual scenario, this could come at the ecological cost of converting natural land and forest into cropland. This research provides a ‘first-step’ in analysing potential trade-offs in the global food-trade-water nexus.

Groundwater is the earth’s largest freshwater resource and is vital for irrigation and global food production. In dry periods farmers pump groundwater to water crops, this is already happening at an unsustainable level in many places — exceeding the rate at which rain and rivers can refill the groundwater stores. This study seeks to identify where groundwater pumping is affecting stream flows and estimates where and when environmentally critical stream flows — required to maintain healthy ecosystems — can no longer be sustained.