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The Franklin Fire set more than 4,000 acres (16 square kilometers) ablaze in Malibu, California, where it destroyed structures and forced thousands of residents to evacuate their homes.

It’s well established that urban tree cover provides numerous environmental and psychological benefits to city dwellers.

Tires and degrading garbage shed tiny pieces of plastic into the air, creating a form of air pollution that UC San Francisco researchers suspect may be causing respiratory and other illnesses.

The eastern U.S. has more trees and shrubs than three decades ago.

All communities rely on physical spaces that are vital to the well-being of their citizens, such as grocery stores, recreational facilities and pharmacies.