Throughout their lifetimes, healthy forests produce more oxygen than they use, while taking in greenhouse gases via plants and soils. This ...

A Fungus growing on a living tree is a symptom of heart rot. Trees are infected through wounds from lawn mowers, weed-whacker whips, deer rubbing, rodent chewing, frost cracks, broken branches and ...

In the wake of last month’s wind and rain storms, many trees throughout the San Fernando Valley have lost branches, split apart, or been uprooted altogether. I recently witnessed the remnants of three ...