A climate change
of the magnitude currently underway has not been seen since the last ice age.
This level of change and increase in temperature historically has occurred
over thousands of years. While average global temperatures have increased
by about .6°C over the past 100 years, the warming trend in Siberia, Canada's
Arctic, and Antarctica has been more than double that, which will ultimately
lead to a rise in sea levels. Climate models predict that the average annual
global temperature will increase by about 2° Celsius (3.6° F) by the
year 2100 if current emission trends continue (based on 1990 as a baseline).
This projected change is larger than any climate change experienced over the
last 10,000 years.
By forgoing its participation in the Kyoto Protocol -- the international
climate change treaty -- the U.S. essentially denied its contribution to
global warming, despite its emission of 53% of the global carbon dioxide
emissions that cause global warming.
Stephen Schneider on Climate Change - A website from a professor at
Stanford spanning media, science and policy
Climate Change - A study by a body of over 2000 scientists on climate
change science and predictions about its impacts
Magazine - Article on species extinction and climate change