Each January, LA Sanitation turns thousands of Christmas trees into mulch that residents can use in their gardens.

Crews in Poway are removing hundreds of eucalyptus trees and other nonnative species along wildfire evacuation routes to improve safety during emergencies, with the project expected to be ...

The holidays are winding down, but many of us are still hanging onto our Christmas trees, sometimes a little longer than we ...

Winter is a busy time at bird feeders—here’s what ornithologists recommend to attract the widest variety of birds.

Native fungi from forests killed emerald ash borers in lab tests, offering a potential new biological tool to slow the ...