The cruel perspective of global warming.

Global warming is phenomenon of increase in the average temperature of an atmosphere of the Earth and the World ocean. During the last century average temperature of the ground has risen on 0,6 ± 0,2 °C . What causes climate changes? Climate changes are caused by lot of natural processes - variations in the earth's orbit, solar activity, volcanic emissions, but present climate changes and global warming are for the most part human-caused . Human activity have the main influence on pollution and carbon - dioxide emission increase . The atmospheric concentration of carbon dioxide has increased by 31 percent during the 150 years of the industrial age. Carbon dioxide is the principal greenhouse gas. Other greenhouse gases are methane and water vapor. The Greenhouse gases accumulated in atmosphere and trap sun's heat and light in the earth's atmosphere . As a result temperature in Earth surface rises - this is Greenhouse effect. Carbon dioxide (CO2) emission comes from power plants, from cars , from the burning of gasoline, from buildings, airplanes, trucks...etc To prevent global catastrophe and to slow down global warming, Kyoto protocol was signed by 141 countries. The Kyoto protocol is international agreement with goals to Reduce greenhouse emissions and to decrease Global Warming.

There are different consequences of global warming : greenhouse effect ,coastal flooding ,ocean warming, sea-level rising , Arctic and Antarctic warming and melting , shrinking of a glaciers... All of us can notice spring arriving earlier , or feel climate changes . Rising of temperature and global warming have influence on infections spreading, animal population changes , killer hurricanes, heat waves, Prognoses of scientists are very pessimistic , by 21st century's end the temperature on the Earth will raise ( on the average ) 4-5 degrees of Celsius There are also more pessimistic forecasts. Planet Earth and human race are in great danger. Global warming threaten to make life on the earth impossible .

The facts and figures about climate changes of the Earth

Let's see some figures and the facts confirming process of global warming and changes of a climate on the Earth.

2002 - 2005 because of thawing the Antarctic shelf the level of the World ocean has raised on 1,5 mm;

1996 - 2005 thawing of ices in Greenland was doubled;

The general obtain of a water level makes about 3 mm a year; From the pre-industrial period, of the middle of XVIII century, to end of 20th century concentration of carbon dioxide and methane have increased for 31 % (CO2) and 149 % (CH4) , Approximately half of increase of carbon dioxide in an atmosphere is related with period after 1965.

Rising of water in the global ocean is caused by two principal causes: 1. thawing of polar ices and 2. expansion of water because of heating. Decrease of volume of absorbed solar radiation on 5 % will help to lower average temperature of the Earth that will slow down expansion of water from heating and thawing of ices for a few degrees.

Scientists forecasts - by the end of 21st century the temperature on the Earth will raise on the average on 4-5 degrees of Celsius .

It is necessary to notice, that the climate on our planet constantly varies: epochs of global warming are replaced by glacial ages and on the contrary - periods of Earth warming and cooling occur in cycles.

Positive greenhouse effect - water aerosol clouds absorb infrared radiation. Negative greenhouse effect - clouds reflect sunlight .

Spring comes 9 days earlier , winter late 10 days .

Since 1978 Arctic sea ice area has shrunk by some 9 percent per decade.