Global warming is expected to increase the intensity of power of nature, such as storms, hurricanes, tropical cyclones and tornadoes. It is determined not by various weather events, such as heat periods or cold snaps or hurricanes, but by the planetary mean above ground temperature. It is already progressing the intensity of hurricanes in the North Atlantic, increasing the possibility of devastating impact when a storm strike.

Global warming is also inducing to more severe swings in the weather in some areas. It is already altering the earth we know, threatening polar bears, reducing winter seasons and producing more violent storms, hurricanes and cyclones. Global warming is a big gamble for an increase in the average temperature of the world's surface.

Global warming is sad news for human life, including differences in rural yields, melting of glaciers and the poles, and the extinction of certain species for ever.

Global warming is an increase of mean world temperatures as a result of what is thought to be as the greenhouse effect. Certain gases in the atmosphere behave like glass in a greenhouse, permitting sunlight through to warm the global surface but holding back heat as it emits back into the space, causing an increase in the average temperature of the global surface. Since the late 1800's, the world's average temperature has going up about 0.7 to 1.4 degrees F (0.4 to 0.8 degrees C). Global warming is determined not by singular meteorological events, but by the planet's mean surface temperature. North America experienced a quite normal winter in 2006-2007, and some parts had intensely cold weather this year.

Greenhouse gases are an air pollution problem, and all air pollution problems of the past have required significantly less to repair than imagined, while diminishing faster than believed. This gives a reason to believe that artificial greenhouse gases can be controlled fairly inexpensively and without sacrificing the world's economy. Greenhouse gases are exhausted by activities such as the combustion of fossil fuels, land changing, and agriculture. Different phenomena such as solar variations and volcanoes have had smaller and probably opposed effects.

Global warming is already under way. The evidence is vast and the urgency of the need for doing something is getting clearer with every new scientific work. We have ten years maximum, to start doing unpleasant changes to our greenhouse gas pollutions, or we will see severe consequences. The great news is that there is much we can do, but only if the planet's assorted leaders acts now and asserts their influence on the rest of the planet, especial such emerging powers as India and China, to unite in an global effort to prevent the global warming.