California's decision to require that all new passenger cars and trucks sold in the state to be emissions free by 2035 takes the fight against climate change to the next level.

New research shows that natural forest regrowth, as opposed to reforestation through tree planting, can capture more carbon dioxide from the air than previously thought.

Forests everywhere alter the movement, quality and availability of water. The world’s urban leaders need to account for the role of forests in securing clean water for residents and the agricultural lands that cities rely on.