A Hawaiian clean energy plant makes electricity from seawater and ammonia

Our oceans hold a lot of unharnessed energy. Here's one way to capture it.

We’re killing off all the animals and they are making it really difficult for us to save them

Scientists want to artificially inseminate endangered species, but that's easier said than done.

We’re making massive waste islands in the sea

A new NASA visualization shows how trash accumulates in oceanic garbage patches.

Lifting the crude oil export ban would be terrible for the climate

Congress may vote as soon as next month on whether to lift the ban, which has been in place since 1975.

Scientists say we’re “super” good at killing stuff

Compared to other predators, humans are like ruthless hunting machines.

Where's the sustainable beef?

Which method of raising cows is the most climate-friendly?

A new study compares the global warming potential of different beef production practices.

This company has 400 people hyped to build Elon Musk’s hyperloop

Hyperloop Transportation Technologies plans to break ground on a test track next year.

Thomas Friedman: The world is hot

Which is true. But calls for shared ecosystems are naive in a world of ISIS.

Could we make tennis rackets out of atmospheric CO2? Science says yes

Researchers have figured out a way to transform everyone's favorite greenhouse gas into a super-strong and lightweight wonder material.