PORTLAND, Ore. (KOIN) — The City of Portland has been planting hundreds of trees to improve the city’s tree canopy to help make it cooler in neighborhoods that haven’t been as shaded in the past.

Urban trees can lower local air temperatures by 8-12 degrees Celsius in Central European cities, and up to 12 degrees Celsius at pedestrian level through radiation blockage and transpiration. This isn ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Lights are hung from the tree canopy over the Chain of Parks in downtown Tallahassee as city employees prepare for the Winter ...