As temperatures increase and prolonged drought continues, a new study of ponderosa pine forests underscores the importance of summer monsoons.

Fires in Canada have sent smoke across several US states, leaving cities like Denver with some of the worst air quality in the world – even far from the actual flames.

Tree diversity can increase storage of carbon and nitrogen in forest soils and ease the effects of climate change, a new study shows.

A new study looks back into history to assess human impacts on the range of Asian elephants and finds sharp decline starting several centuries ago.

Fires here can affect meltwater timing and water quality, worsen erosion that triggers mudslides, and much more, as two scientists explain.

Just 2.5% of the country has been continuously wooded for centuries.

Reservoirs and streams are in good shape in California and the Great Basin, but groundwater and ecosystems are another story. And then there’s the Colorado River Basin.

Many beloved wildflowers bloom in early spring, while trees are still bare and the flowers have access to sunlight. Climate change is throwing trees and wildflowers out of sync.

Protecting old and mature trees is the simplest and least expensive way to pull carbon out of the atmosphere – but proposed logging projects threaten mature stands across the US.