what causes global warming – 56% – Do Americans Know Where Scientists Stand on Global Warming? – Yahoo! News

Posted by Rolf Joho on January 8th, 2010 filed in What Causes Global Warming

56% – Do Americans Know Where Scientists Stand on Global Warming? – Yahoo! News

An overwhelming number of scientists (84%) say the earth is warming because of human activity, while just 4% of scientists say there is no solid evidence the earth is warming. Yet only 56% of Americans say that scientists agree that global warming is real and man-made. More than a third (35%) say scientists have not reached a consensus on climate change. The public’s perception of where the scientific community stands on climate change is tied to their own opinions on the issue. In a July Pew Research survey, about half the public (49%) said human activity is creating global warming. (It should be noted that an October Pew Research survey found far fewer Americans seeing solid evidence that humans are causing global warming.) Among this group, three-quarters (76%) said that scientists have reached a consensus on climate change and its cause. Among the 36% of Americans who said global warming is real but due to natural causes just 41% said there was a scientific consensus on the issue. And among those who said there is no evidence of climate change (11% of the public) a strong majority (68%) said there is no agreement among scientists on global warming. About one-in-five global warming skeptics (22%) say there is scientific agreement that human activity is causing climate change.

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Man-made Causes of Global Warming
Man-made causes probably do the most damage to our planet. There are many man-made causes of global warming. Pollution is one of the biggest man-made problems. Pollution comes in many shapes and sizes. Burning fossil fuels is one thing that causes pollution. Fossil fuels are fuels made of organic matter such as coal, or oil. When fossil fuels are burned they give off a green house gas called CO2. Also, mining coal and oil allows methane to escape. How does it escape? Methane is naturally in the ground. When coal or oil is mined you have to dig up the earth a little bit. When you dig up the fossil fuels you dig up the methane as well letting it escape into the atmosphere.

Another major man-made cause of Global Warming is population. More people means more food, and more methods of transportation. That means more methane because there will be more burning of fossil fuels (if you're into gas burning cars like our planet is), and more agriculture. If you've been in a barn filled with animals and you smelled something terrible, you were smelling methane. Another source of methane is manure. Because more food is needed to feed the population we have to raise food. Animals like cows are a source of food which means more manure and hence more methane. Another problem with the increasing population is transportation. More people means more cars, and more cars means more pollution. Also, many people have more than one car. There are definitely ways of raising animals and farming that use no manure and no methane. Once we realized the problem we should have stopped immediately using manure. Instead we choose to continue killing the planet. We are a very stubborn race.

Since CO2 contributes to global warming, the increase in population makes the problem worse because we breathe out CO2. Also, the trees that convert our CO2 to oxygen are being cut down because we're using the land that we cut the trees down from as property for our homes and buildings. We are not replacing the trees (trees are a very important part of our eco-system), so we are constantly taking advantage of our natural resources and giving nothing back in return.

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