SORU: aşağıdaki parçaya göre cevaplayınız
The passage tells us that ----.
The greenhouse effect is a natural process that
maintains the Earth's temperature at levels
hospitable to life. Energy from the sun warms the
Earth. The Earth absorbs heat from the sun and
radiates it back into the space in the form of infrared
radiation. About one percent of the Earth's
atmosphere is composed of greenhouse gases,
primarily water vapour, carbon dioxide, ozone,
methane and nitrous oxide. Together, these gases
reflect enough heat back to the earth to maintain the
average temperature of our planet. At issue is
mankind's ever increasing impact on enhancing the
greenhouse effect, contributing to overall global
warming. About one quarter of global methane
emissions from human activities comes from
livestock and the decomposition of animal manure
and the rest comes from the supply and use of fossil
fuels. The destruction of large forests has reduced
the number of trees available to clean the air. When
forests are cleared, most of the carbon burned
escapes into the atmosphere.