Before interviewing Energy Secretary Steven Chu, <i>The Daily Show</i> host Jon Stewart fell asleep talking about the Markey-Waxman energy bill.

In his first week on the job, new U.S. Energy Secretary Ernest Moniz makes it clear he sees 'no ambiguity' about the scientific consensus on global warming.

Temporary dye from Lauren Bowker of The Unseen works using thermoregulating molecules.

How to help provide people on every continent with food that is safe, affordable, and sustainable for people and planet.

Meet the leaders of the maker movement, the bright entrepreneurs paving the way for the age of homespun inventions.

Conservation group Lion Guardians has helped East Africa’s Masai tribesmen bring back the big cats and better their own lives.

Talia Frenkel created a company that makes healthier condoms — but that's not all.

How a pen-pal relationship between altered two lives, inspired a book and continues to help others around the world.

A couple disappeared into mountain silence for 18 months as part of the first substantial study on the physical and emotional impacts of meditation.

Philosopher suggests that bioengineering people to be herbivores with small statures and cat-like eyes could help to save the planet.

Technology could lead to the transformation of clothes, cars, buildings and even billboards.

In rural areas, Internet connectivity can be a powerful force for economic empowerment.

Build enough Powerwall batteries and you can run the world on renewable resources.

Climate change could affect our food supply at the same time that global population is increasing.

Research reveals you can change facets of your personality if you're motivated and committed.

billy barr spent the last 40 years living alone in a cabin in Gothic, Colorado, and collecting meticulous weather data about temperatures, snowfall and more.

The Great Green Wall is rooted in Africa's Sahel region on the southern border of the Sahara. Once completed, it will be the largest living structure on Earth.

New research suggests zeppelins could replace cargo ships at a fraction of the pollution.

A new time-lapse video shows Earth's glaciers in Alaska and the Yukon melting at an accelerated pace.

Vikings endured a cold-weather catastrophe and may have left a warning on the Rök stone.

La Jolla: A Little Change Can Make a Huge Difference

Most U.S. safety scorecards are based on information from the past. A new scorecard adds scientifically based predictions about the future.

We Can Solve It asks for public support to get ABC to run 'Repower America' ad.

Video: As climate talks continue in Copenhagen, former vice presidential candidate Sarah Palin finds herself in a war of words with Al Gore. NBC's Andrea Mitche

The Climate Project, founded by Al Gore, is launching a new website designed for teens who want to live greener and fight climate change. You're even required t

The former vice president praised Romney for not being consumed by the 'anti science wing' of the Republican party.

The former vice president did not hold back in his 7,000-word essay in Rolling Stone about the climate change debate.

An excerpt from the Climate Reality Project compares today's argument about climate change to the '60s argument over cigarettes.

After the Heartland Institute compared global warming to the Unabomber, two climate activism groups decided to strike back.

Al Gore's 24-hour Climate Reality broadcast has attracted millions of online viewers. A competing broadcast by climate doubters had just thousands.

The new Starkey Halo 2 hearables put the internet in your head.

The way we use our cities has changed, the forces that drive them, all driven by the phone. It's also likely that we ain't seen nuthin' yet.

YOKOHAMA, JAPAN (March 26, 2020) - Mitsubishi Hitachi Power Systems, Ltd. (MHPS) announced the following group company personnel changes effective March 31 and April 1, 2020.

YOKOHAMA, JAPAN (March 26, 2020) - Mitsubishi Hitachi Power Systems, Ltd. (MHPS) announced the following executive-level personnel changes effective June 19, 2020.  

Find out how much water it takes to produce your everyday grocery items and how much can be saved with a few minor tweaks in behavior.

Turning a grassy lawn into a vegetable garden can significantly reduce greenhouse gas emissions, according to a new study.

Coffee-growing regions are set to lose key pollinators like bees by midcentury due to climate change.

From contacting your representatives to signing petitions, here are 5 ways to make your voice heard, and 2 that aren't worth your time.

These kids see no reason to wait until they are older to make a difference in the world.

Tina Solera made it her life's mission to save the galgo, a traditional dog of Spain that has fallen into deep disregard.

Here are eight young people who made an impressive mark on history and our world.

A sick hen led photographer Janet Holmes to a group of people who live with chickens as equals. She decided to document those relationships.

Through the animal welfare group he founded, Morris Darbo is saving more than the lives of animals.

Air travel could continue to get cheaper but it could also get a lot less comfortable, as seat sizes shrink and the differences between classes gets wider.

This ultra-strong, ultra-thin supermaterial could yield a technological revolution.

The mountain pika is sensitive to temperature change. Warmer mountains and less snowpack are problems for this rabbit relative.

The economic cost of doing nothing to reduce greenhouse gases is higher than fighting the problem, study finds.

The similarities between coronavirus and climate change are many. It's just the time scale that's different.

'Fuel' documentary brings change to classrooms. Film's green curriculum inspires schools to switch to biodiesel buses.

Algae-based fuels are finally reaching the commercial stage, and they're already in airplanes and U.S. Navy ships. And they could be coming soon to a gas statio