who and why???

Because of the known science of the climate, scientists have discovered that in fact the earth's climate is always changing. The study of glaciations in the past, that climate change itself, and changed. What happens? Meteor falls? Variations on a hot day? Mountain, which erupted in a cloud of smoke? Changes in wind direction due to changes in the structure of the earth and ocean currents? Or because of the changing composition of the air? Or another reason?


Until a new one in the 19th century, the climate began to make the gas content in the atmosphere, also known as the greenhouse gases affect the climate on Earth to study. What greenhouse gases?

In fact, the so-called "greenhouse gases" to the effect, as the greenhouse effect is a kind of molecules in the atmosphere. The greenhouse itself is a natural consequence of the earth's surface to maintain a normal temperature about 30 ° C, or if not, there would be no life on earth.

The € 1820, father Fourier discovered that the atmosphere was bad to break it (only) the influence of sunlight entering the Earth's surface, but not all the light emitted into the Earth's surface Bounce Out, infrared radiation, which was found to be displayed, so the mood of the heat (the principle greenhouse) to absorb.

Thirty years later, Tyndall found that kind of hot gases, mainly carbon dioxide and water vapor, and the molecules that ultimately named as a greenhouse gas, as we know it today. Arrhenius later revealed that the concentration of carbon dioxide doubled, the increase in surface temperature is very important.

Since the discovery of Fourier, Tyndall and Arrhenius, the scientists understand how emissions of greenhouse gases continue to radiation, which improves collaboration calculation of greenhouse gas concentrations and higher temperature fluctuations. If the carbon dioxide concentration doubled, and then the temperature can reach 1 ° C

However, the atmosphere is not as simple model calculation of the growth temperature of more than 1 ° C, due to factors such as the change in the number of clouds, the reflection of heat between land and sea, humidity, changes in the surface of the earth, or because land clearing, changes in the surface, or other causes, natural or manmade. The evidence suggests the climate is warmer and the atmosphere holds more moisture, and store more heat, warming strengthening routine calculation.

Since 2001, research on global climate dynamics indicate that the world experienced at least more than 3 ° C warming since pre-industrial era, when the concentration of greenhouse gases under pressure to stabilize at 430 ppm CO2e (parts per million = ppm = parts per million CO2 equivalent - that determines the ratio of the number of gas molecules of CO2 one million air dry). To be sure, since 1900, the Earth experienced warming is 0.7 ° C.

Then, if the warming does not occur, as already mentioned, who became known as global warming (or slang expressions in English, you can refer to global warming): Is this the inevitable natural phenomenon? Or is there any reason that is significant, and thus was "popular" as it is today? Maybe it's because Al Gore in his film "An Inconvenient Truth", a popular global warming? Of course not so simple.

International cooperation is necessary to say that the man who was the main cause of global warming. IPCC report (Intergovernmental Panel on Climate Change) in 2007, shows that the global average since 1750 is caused by human activity global warming. Many changes in greenhouse gases and aerosols on solar radiation and the total energy of the Earth affect the climate. Quantities are expressed in radiation force as a means to measure whether the global climate is cold or hot (red button on the warmer or positive values, blue and vice versa), showed that he was due to human activities (anthropogenic) is a major driver of global warming