Global warming is the long-term, cumulative effect that greenhouse gases, primarily carbon dioxide and methane, have on Earth's temperature when they build up in the atmosphere and trap the sun's
heat. It's also a hotly debated topic. Some wonder if it's really
happening and, if it's real, is it the fault of human actions, natural
causes or both?
When we talk about global warming,
we're not talking about how this summer's temperatures were hotter than
last year's. Instead, we're talking about climate change, changes that happen to our environment, atmosphere and weather
over time. Think decades, not seasons. The term global warming itself
is a bit deceptive because it implies we should expect things to get
hotter -- not necessarily stormier, drier and even, in some instances,
colder. Climate change impacts the hydrology and biology
of the planet -- everything, including winds, rains and temperature, is
linked. Scientists have observed that the Earth's climate has a long
history of variability, from the cold climes of the Ice Age to
temperatures as hot as an Easy-Bake oven. These changes are sometimes
noted over a few decades and sometimes stretch over thousands of years.
What can we expect from a planet undergoing climate changes?
Scientists studying our climate have
been able to observe and measure changes happening around us. For
example, mountain glaciers are smaller now than they were 150 years ago,
and in the last 100 years, the average global temperature has increased
by roughly 1.4 degrees F (0.8 degrees C) [source: EPA]. Computer modeling
allows scientists to predict what could happen if the climate pattern
continues on its current course, projecting, for instance, that
temperatures could rise an average of 2 to 11.5 degrees F (1.1 to 6.4
degrees C) by the end of the 21st century [source: EPA].
In this article, we'll look at 10 of
the worst effects of climate change, including some immediate effects
observed and some hypothesized through climate modeling.
Global warming isn't just about things
getting hotter -- other changes can occur, including stormier, drier and
even, in some instances, colder conditions.
Bisa Dilihat Seperti Gambar diatas dampak dari Global Warming !
http://dsc.discovery.com/tv-shows/curiosity/topics/worst-effects-global-warming.htm
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