Human Impact On Air And Climate
Beginning of paper
The importance of human influence on global climate change was
again highlighted in a groundbreaking study of Earth's temperature over the
past 600 years. Reconstructing the global temperature record,
climatologists have determinined that three recent years were the warmest
years since AD 1400 -- ....
Middle of paper
.... "forcings" -- factors that can affect the climate significantly but
which are not part of the climate system itself. Based on statistical
comparisons of reconstructed northern hemisphere temperatures, the best
estimates indicate that natural changes in the brightness of the sun and
volcanic emissions both played an important role in governing climate
variations over the period studied. But over the past few decades,
greenhouse gases produced by human activities appear to have had an
incre ....
------------------
Word count: 842
Page count: 4 (approximately 250 words per page)
