Bill Anderegg

Climate change increases risks of tree death

Threats from fire, drought and insects could reshape U.S. forests.


What we’re still learning about how trees grow

Fundamental questions remain about what factors limit tree growth. A new study may hold answers.


Yes, allergy seasons are getting worse. Blame climate change.

If you live with seasonal allergies and feel like the pollen seasons feel longer and longer every year, you may be right.


Know the risks of investing in forests

Use of forests to offset carbon emissions requires an understanding of the risks


How trees affect the weather

New research led by U biologists finds that some plants and trees’ water use can make droughts more intense.