A new study found global fertility rates are on the decline in hundreds of countries

A new study investigates our ancient cousins' hunting abilities.

Today is the end of the first week of my book tour for my new book Urban Green. I've crisscrossed North and South Carolina to engage as many people as I can at some of the best schools in the

Investing in youth is an investment in a sustainable future

Recycled aluminum and silver get another shot at becoming beautiful with this handmade collection, created with Japanese origami papers.

Our absolutely adorable photo of the day comes from Mount Evans, Colorado.

This simple Australian design has some interesting features and benefits.

Was it design, or was it our resistance to change? What made the NoMix a NoGo?

I really don't want to crap all over this new toilet design, but it is too complex, too expensive and no, it won't charge your phone.

Insect hotels are architectural, recycled and perfectly formed. But you can't stay there: they are for the bugs.

A young sea turtle found in the Netherlands will be released after a three-year recovery. We also have the search for the "extinct" Javan tiger, Sylvester Stallone's bat cave incident, and more.

Wind power is not just a Danish success story - Swedish wind is growing leaps and bounds. But the bats may suffer, so the Swedes are trying to impose 'bat happy hour'

Sea cucumber poo may be the key to saving the world's great coral reefs from devastation. Invasive pythons are doing damage in the Everglades, eight sea lions were found shot to death in Washington and more.

It's National Pollinator Week! Start a garden, encourage pollinators, or join an event in your area.

Did you know that Bat Week takes place every year, October 24–31? The time is set aside to raise awareness of the many contributions that bats make to the planet and encourage conservation of bat species.

Geothermal is a stable & plentiful source of clean energy available all around the world, including in the United States (especially in the West). But that industry is still in its infancy and very little of that resource's potential is being tapped.

From Gasland II to Dirty Business, some of the most active environmental documentary makers in the country are joining forces to build a movement.

Brazil's economy is growing fast, and it is expected to need an increase of 50% in power generation capacity over the next decade.

Rob Cotter used to build expensive sports cars. Now he makes vehicles that are much, much cooler.

The ENGO charging station uses kinetic tiles and solar panels to charge up to 14 smartphones at a time, and provides free WiFi access and an emergency phone.

This 5W thermoelectric generator converts heat from a chimney or camp stove into electricity for charging USB devices.

The floating tidal stream turbine off the coast of Scotland has proven that it can produce power safely and cheaply year round.

Famed chef Magnus Nilsson will be serving dinner for three days in Åre, Sweden … 4,200 feet in the air.

We also have to start retiring what we already have and replacing it with cleaner power plants, furnaces and vehicles. Now.

Perhaps more importantly, it's also giving customers the option of refusing such sachets in the first place.

A bill is introduced that would make it illegal to "to promote, support, mandate, require, order, incentivize, advocate, plan for, participate in or implement sustainable development."

Wendell Berry is a fount of wisdom and inspiration, so it was great to see that Bill Moyers spoke with the farmer, poet, eco-philosopher about the role of activism and spirit in creating positive change.

There is some exceptional the nonsense coming from Republican members of the US Senate Committee on Environment and Public Works. Good grief.

A new study from Pew Research is totally depressing, showing how left and right are moving further apart.

Ecotricity's collapsing cooling towers return. This time, they're tapping into popular anger over utility profits.

What to do about all that CO2 emitted when you make cement? Inject it back into the stuff and turn it back into limestone.

I've done it, you've done it, we've all done it. But why do we do it?

WARNING: Driving cars kills. Should companies be able to market them as speedy, sexy objects of desire?

A damning report says children face two main threats globally, and most nations are failing to address these.

This year, we should resolve to walk more. It will keep you healthier and happier.

Got a froggy "city throat"? It might be from metal particles emitted from braking cars and trucks.

'Fly less' is the obvious answer, but there are some effective interim solutions, too.

Everything fit into my carry-on backpack, and I still ended up with extras.

Yes, it's National Bike Month. What's even better - it's National Bike Year, and Maybe National Bike Decade. Here's Three Ways to Up Your Cycling Enjoyment

We're heading to Rio for World Environment Day. Here's a sneak peek at what's happening in Rio de Janeiro this week.

Agenda 21 crazies, poison plastic people and hey, some green buildings and furniture!

Seniors residence so green and attractive that the government and nonprofits should jump up and say "We built it!"

Home automation, LED lighting, ceiling fans, insulation, energy monitoring and other tricks will save energy without sacrificing the experience in our holiday rental apartments.

It's a form of travel that is socially distant, cheap, and well-ventilated.

Trivia challenge: how many years can you run London with the power used on Christmas lights?

An island once home to a Renault car factory will be sustainably transformed. We also have a Christmas tree powered by jumping elves, a hydrogen-powered tractor, and more.

We've done them all - the organic Xmas tree, the re-plant live Xmas tree, the bike-delivered Xmas tree. This one feels the greenest of them all.

Because it is really a Solstice Tree, and it is all about life in a harsh climate.

It's a problem when nobody wants to touch anything.

Planting trees is one of the most effective things we can do to fight climate change. Too bad Arbor day is missing the opportunity.