(Updated at 4:35 p.m.) Tree canopy in Arlington County is lower than it was in 2016, according to a new privately-funded study paid for local residents. The residents, who are involved in Arlington ...

SAN FRANCISCO (KGO) -- The poor air quality in the Bay Area has been the focus of much attention. One way to remove the pollutants from the air is to plant more trees. But places like San Francisco ...

Tree people talk about the canopy like an existential struggle. On one side, the irreplaceable nourishment of water, sunlight, open green space and air — all fundamentals. Troops, each a sort of ...