Global warming is expected to increase the intensity of forces of nature, such as tornadoes and hurricanes. It is determined not by individual weather events, such as heat waves or cold snaps or hurricanes, but by the global mean surface temperature. It is already increasing the intensity of hurricanes in the North Atlantic, increasing the risk of devastating impacts when a storm hits.
Global warming is also leading to more dramatic swings in the weather in some areas. It is already affecting the world we know, endangering polar bears, shortening ski seasons and creating more intense storms. Global warming is a huge risk, it is an increase in the average temperature of the earth's surface.
Global warming is bad news for human life, including changes in agricultural yields, melting of glaciers and the extinction of certain species for ever.
Global warming is an increase of average world temperatures as a result of what is known as the greenhouse effect. Certain gases in the atmosphere behave like glass in a greenhouse, permitting sunlight through to heat the earth's surface but trapping heat as it radiates back into the space, causing an increase in the average temperature of the Earth's surface. Since the late 1800's, the global average temperature has increased about 0.7 to 1.4 degrees F (0.4 to 0.8 degrees C). Global warming is determined not by individual weather events, but by the global mean surface temperature. North America experienced a fairly normal winter in 2006-2007, and some parts had extremely cold weather this year ?
Greenhouse gases are an air pollution problem, and all air pollution problems of the past have cost significantly less to fix than projected, while declining faster than expected. This gives cause to hope that artificial greenhouse gases can be controlled reasonably cheaply and without wrenching sacrifices to the global economy. Greenhouse gases are released by activities such as the burning of fossil fuels, land clearing, and agriculture. Other phenomena such as solar variation and volcanoes have had smaller and probably negative effects 1950.
Global warming is already under way. The evidence is vast and the urgency of taking action becomes clearer with every new scientific study.
Bob Wright has produced more interesting and informative articles on Global Warming. They can easily be found here > http://globalwarmingthefacts.com/ |
