|
Trees can lower air temperatures by
transpiring water and shading surfaces. Recent independent
studies confirm that well-shaded neighborhoods can run up to
10°F cooler than their deforested counterparts. The cover from
properly placed trees (western and southern exposures) can
reduce home air-conditioning costs by as much as 30 percent and cut up
to 25 percent against winter heating bills.
Reduced demand for energy means that power plants generate
lower emissions of carbon dioxide, the heat-trapping element
which is the dominant building-block of greenhouse gases.
Research studies estimate that if only three trees were added to
each unshaded home property nationwide, we might realize over $2
billion annually in energy cost savings.
This natural cooling ability of trees is highly effective
wherever so-called heat islands or concentrations of paved and
covered surfaces (such as parking lots, sidewalks and rooftops)
exist. In the absence of shade trees, these constructed surfaces
freely absorb heat and are responsible for increased
ground-level production of ozone.
|
Forestry Links