The earth is getting warmer, the changes are small, far, but they are expected to grow and speed up. Global warming is causes by many things, the amount and pattern of warming that's been measured can't be explained by these factors alone. The causes split up into two groups, anthropogenic causes, and natural causes.
The global warming is causes by greenhouse gases. Many greenhouse gases occur naturally, such as water vapor, carbon dioxide, methane, nitrous oxide, and ozone. Carbon dioxide is released into the atmosphere by the burning of solid waste, wood products, and fossil fuels.These greenhouse gases act like a mirror and reflect back to the Earth some of the heat energy which would otherwise be lost to space. The reflecting back of heat energy by the atmosphere is called the "greenhouse effect".
The effect of greenhouse gases (GHGs) emitted by humans. Director of the Earth System Science Center at the University of Alabama in Huntsville Christy says, "The carbon dioxide from fossil fuels is distributed very evenly around the globe and not concentrated in the Arctic, so we can't blame greenhouse gases for the Northern Hemisphere warming over the past 27 years... The most likely suspect for warming is a natural climate change or cycle that we didn't expect or just don't understand." This quote describes a natural cause to global warming, and refrains from relating to cause by carbon dioxide emissions from humans.
Population growth is another factor in global warming, because as more people use fossil fuels for heat, transportation and manufacturing the level of greenhouse gases continues to increase. As more farming occurs to feed millions of new people, more greenhouse gases enter the atmosphere. Methane emissions also occur during the production and transport of fossil fuel. As a result, driving cars, using electricity from coal-fired power plants, or heating our homes with oil or natural gas, we release carbon dioxide and other...