Trees control climate by
moderating the effects of the
sun, rain and wind. Leaves
absorb and filter the sun's
radiant energy, keeping things
cool in summer. Trees also
preserve warmth by providing
a screen from harsh wind. In
addition to influencing wind
speed and direction, they shield
us from the downfall of rain,
sleet and hail. Trees also lower
the air temperature and reduce
the heat intensity of the
greenhouse effect by
maintaining low levels of
carbon dioxide