21-07-2012, 01:02 PM
Global Warming and Its Effects on the World
Global Warming and .ppt (Size: 623 KB / Downloads: 39)
What Is Global Warming?
Global warming is the warming of the earth through carbon dioxide (CO2) being pumped into the atmosphere from tailpipes and smokestacks. Then the gases trap heat like the glass in a greenhouse. This is where the term the “greenhouse effect” came from.
What’s Happening
Scientists say that the barrier insulating the continental ice caps is melting.
“The impacts of warming temperatures in Antarctica are likely to occur first in the northern sections of the continent, where summer temperatures approach the melting point of water, 32 degrees F (0 degrees C).”
What Will Happen
Rising global temperatures are expected to raise sea level, and change precipitation and other local climate conditions. Changing regional climate could alter forests, crop yields, and water supplies. It could also affect human health, animals, and many types of ecosystems. Deserts may expand into existing rangelands, and features of some of our national parks may be permanently altered.”