"We are still in." On June 5, with these four words a group of U.S. businesses and investors with a combined annual revenue of $1.4 trillion sent a powerful message to the world

No single person could hope to count the world’s trees.

As the Trump administration keeps moving aggressively to roll back environmental protections, it has a potent legal weapon — the scores of federal judges that President Trump will be appointing, most of whom are expected to hold anti-regulatory, pro-business views.

Coastal deltas are becoming more at risk of flooding due to land subsidence, or the gradual sinking of the Earth’s surface, and sea-level rise.

I first become interested in zero energy buildings in 2003.

Vast quantities of methane hydrates — frozen deposits of natural gas found on the sea floor — exist worldwide.

How can cities ensure that new actions being taken to mitigate climate change don’t negatively affect broader issues of equity?

Researchers are considering ways to use synthetic biology for such conservation goals as eradicating invasive species or strengthening endangered coral.

The challenges on the road to a circular economy are evident within the carpet industry.The U.S. sector produces about 12 billion square feet of carpet and rugs per year.

US scientists have calculated the total amount of plastic ever made and put the number at 8.3 billion tonnes.