Simply put, global warming is the phenomenon in which temperatures are seen to be slowly rising worldwide as evidenced by weather records kept over the last century.
Today, many scientists believe that heavy industry has been the primary
cause of rising temperatures. To support these claims, they point
to the burning of oil, gas and other carbon-based fuels as the
reason why atmospheric levels of carbon dioxide have increased.
levels of carbon dioxide have, in turn, threatened an increase
in the magnitude of the greenhouse
effect whereby the surface of the earth will inevitably become
hotter. The weather changes brought about by global warming may
also see instances of more powerful hurricanes,
activity, scientists say.
This color-coded map shows a progression of changing global surface temperatures from 1967 to 2007. Dark blue indicates areas cooler than average. Dark red indicates areas warmer than average. (Credit: NASA/Goddard Scientific Visualization Studio)
Today, the U.S. is alone among industrialized nations in its refusal
to ratify the Kyoto
Protocol that calls for for a universal reduction in carbon
Reflecting the official
government position, the U.S. Environmental Protection Agency
has adopted the phrase 'climate
change' rather than 'global warming' to summon into the debate
possible natural causes for the earth's rise in temperature. Some historians, for instance, point to the Medieval
Warm Period and related evidence that global
warming, followed by "The Little Ice Age", occurred
naturally during the Middle Ages.
cause, physical evidence of global warming is clear to scientists
who have tracked the progression of warming trends worldwide.
Seen most recently in the melting
coastal regions of traditionally frigid Greenland, more dramatic evidence has been seen in the breakup of an Antarctic
ice shelf (measuring twice the size of Manhattan Island) in
late 2009 with further polar ice cap melting ongoing every year since.
On the Web,
learn more about global warming with a look into investigations,
theories and hotly contested debates on the science and politics
of this century's most controversial issue, with more on the history
of global warming and what it may mean for our future ...
What's up with the weather? - Here's the PBS multimedia presentation based on the television special
outlining the global warming debate, how evidence points to the
burning of fossil fuels as a primary cause and what government
and science can do about it, with related video clips, graphs
and illustrations, FAQ, teacher's guide.
Warming - Check out an extensive overview from Wikipedia outlining
recent scientific research as well as the controversy surrounding
global warming, its possible causes, effects on ecosystems and
glaciers, related costs & financial consequences and relationship
to ozone depletion, including charts & illustrations, related
references, and links to more information.
- Intergovernmental Panel on Climate Change - The official
site of the Nobel prize-winning United Nations report features findings
and warnings, recommendations on global action, graphics &
presentations, glossary of terms, related resources.
Warming Program | Union of Concerned Scientists -
policy to help stem the threat of global warming by reducing greenhouse
effect gases into the atmosphere, various reports show evidence of
how it effects hurricanes, recent heat waves and other climate
changes. Also read up on practical solutions for solving the global warming
dilemma now, and ways visitors can help.
- Global Warming
- Clear, straightforward FAQ on the topic covering questions about
rises in temperature, ocean level changes, increases in greenhouse
gases, plus links to related information and statistical data.