More than 100 cities across the globe get 70 percent or more of their energy from renewable sources, according to London-based CDP.

Apple suppliers have committed to clean up their act as well.

Although a recent renewable energy bill stalled, the hurricane-ravaged territory isn't giving up on its fossil fuel-free aspirations.

District of Columbia lawmakers approve legislation that fast-tracks the city's bold clean energy goals.

Actor says his oil separation technology coupled with special boats can effectively stop an oil slick from reaching shore.

There have been thousands of oil spills in the Gulf of Mexico in the year since BP's massive oil spill. We shouldn't be surprised.

Naturally occurring bacteria gobbled up at least 200,000 tons of oil and natural gas that spewed into the Gulf following the BP Deepwater Horizon spill, a new s

Nancy Rabalais has spent a lifetime documenting the effect of ocean "dead zones." The Louisiana researcher has increased our understanding of these hypoxic zone

The oil giant has pleaded guilty to 12 felony counts and will pay a record $4.5 billion fine. Three of its employees have also been charged with manslaughter.

Mother's Day Gift Guide 2010. While Mother Nature is the main event this week, don't forget that there's another Mother-celebrating day just around the corner..

While Mother Nature is the main event this week, don't forget that there's another Mother-celebrating day just around the corner...

While Mother Nature is undisputedly the center of attention this coming weekend, don't forget that there's another Mother-celebrating Sunday on the horizon ...

Cement made from 'fly ash', a byproduct from coal-fired power plants, has a remarkably lower carbon footprint, recycles industrial waste, and is more durable.

Engineer Henry Liu is honored for inventing a way to transform toxic waste into environmentally friendly bricks used for construction.

From your heart to your head, here's why you should lace up your sneakers and walk.

The benefits of cumulative exercise are well-documented. Here's how to get your exercise, 10 minutes at a time.

Before clean air laws were passed in Pittsburgh, smoke left buildings in a nighttime shroud all day, yet air quality issues aren't really in the past.

A new study by WHO finds that air pollution has worsened since 2011, signaling increased health risks for city dwellers.

Oregon's Silver Falls State Park is a wonderland of rivers, streams, rainforest and cascading water.

Meet 15 rare animal species whose futures could be determined — for better or worse — in 2015.

Seeds found during an archaeological dig on First Nations land revive a long-lost varietal.

The discovery offers new insights about dinosaur plumage, hinting at a 'chestnut brown' creature that couldn't fly.

The crest-tailed mulgara was once a common sight in New South Wales deserts before other predators edged it out of the habitat.

Scientists identified the cause of the mystery die-off, as half of the species' population perished within a matter of weeks in 2015.

This is the first photograph ever taken of the bizarre and mysterious species, Thismia neptunis.

Researchers discovered a Chelonoidis phantasticus giant tortoise on Fernandina Island. The last time this tortoise was seen was 1906.

Researchers extract nuclei from a preserved woolly mammoth carcass, implant them into the egg cells of mice, and watch as the bits became animated.

Humans have driven almost 600 plant species extinct since 1750s and that number is likely much higher.

Check out the top entries from MNN's Green Dog of the Year Contest!

If you’re gluten-free or just avoiding the dreaded beer belly, consider trying these lighter, lesser-known alternatives to beer instead.

Whether it's a white lie or a whopper, fibs are part of our daily lives. We like to think we're honest but, well, we're not. Test your falsehood expertise.

It's time for some healthy change. Here are some fundamental truths you need to know about diet, exercise and other wellness goals.

The 57,000-acre San Andres Refuge, which works to restore desert bighorn sheep, launched its quest for energy independence in 2005 and has implemented several s

Rich natural gas deposits off the shore of Israel can meet the country's energy needs well into the next century, provided it can be extracted economically.

Ubiquitous Mardi Gras beads can be made of other things: Biodegradable seed bombs, anyone?

The dictionary's most popular word of the year has to do with waste.

Think bird-watching is boring? It's not if you visit these 10 destinations during bird migration season.

A colorful oath or spirited expletive can heal the body and soul. (We have the science to prove it.)

What product took top honors at the green geek's conference? Matt Hickman reports.

GE Ecomagination contest hopes to solicit the smartest solutions for a much-needed quantum leap in electrical grid technology.

The new towers collect much more sunlight during the mornings, evenings and all days of the year regardless of clouds or shadows

Technology may be drastically changing each year, but there are a few older gadgets you can still buy without regretting your decision later.

Experts predict the World Wide Web will become seamlessly integrated into every aspect of our lives — but with a dark side to consider.

Benny the beagle was the subject of a 1,000-person search that also involved a helicopter.

While there are no remaining unmapped islands waiting to be discovered, these destinations live up to the deserted island lore.

An Armillaria gallica mushroom found in Michigan's Upper Peninsula is growing fast, and the secret to its phenomenal growth might hold the cure to cancer.

The UP North Loop offers a unique but daunting tour through an array of wild landscapes.

With the right equipment and preparation, it can be worth the hard work of venturing into the wilderness in winter.

Despite the recession, organics made an impressive showing in 2008. Find out how impressive.

Looking to avoid a date with pesticides this Valentine's Day? Outfit your boudoir with stylish sheets made from organic cotton.