Just how much of the Amazon is burning? An expert weighs in on the most reliable methods for assessing the scale and significance of the fires.

"We must have fire in order to continue the traditions of our people. There is such a thing as good fire."

Wildfires can send hazardous particles way beyond the flames, potentially upping health risks as far as 600 miles away.

Trees are great at removing carbon dioxide from the air, which can help fight climate change, but how long will that help last?

Invasive pests kill so many trees each year, they cut the carbon storage of forests by the equivalent of emissions from 5 million cars.

Poaching, logging, and other human activities are threatening the forests of the Republic of Congo and the incredible diversity of wildlife that live there.

Many island conifers are facing extinction, report researchers, even when considering different kinds of wiggle room.

"Our study shows clearly that forest restoration is the best climate change solution available today. But we must act quickly..."

"Birds that have been struggling elsewhere are positively thriving in these restored areas."

A lack of water—not increasing temperatures—is limiting the growth of forest trees around the world, a new study shows.