Global Warming Essay

1546 WordsDec 3, 20127 Pages
Global Warming Many people believe that Global Warming is a topic that has been used to “scare” the public into living greener. Although there is nothing wrong with wanting people to use less energy and put off less pollution, creating a worldwide problem to benefit your own cause is wrong. The most respected scientific bodies have stated unequivocally that global warming is occurring, and people are causing it. The only real debate is about how fast warming will occur, and how much damage will be done. As a result of human activities those produce heat-trapping CO2 and other greenhouse-gas emissions. The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions. Since part of this re-radiation is back towards the surface, energy is transferred to the surface and the lower atmosphere. As a result, the temperature there is higher than it would be if direct heating by solar radiation were the only warming mechanism. Greenhouse gases greatly affect the temperature of the Earth; without them, Earth's surface would be on average about 33 °C (59 °F) colder than at present. Between 1961 and 1997 the world's glaciers lost 890 cubic miles of ice. Climate-change skeptics like to point out that a few glaciers are expanding, but scientists conclude these are isolated cases, resulting from heavier-than-usual regional snowfall. The overwhelming majority of glaciers are still losing ice at an alarming rate. The IPCC estimates that melting ice caps and glaciers accounted for about 25% of sea level rise from 1993 to 2003. In addition, the massive ice sheets in Greenland and Antarctica are losing ice. Over the 20th century sea level worldwide rose by 6.7 inches, and the 2007 IPCC report concludes it is now rising faster. Recent observations published in Nature Geoscience

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