Pollution by greenhouse


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indirect pollution: the greenhouse effect.

Definition of greenhouse.

Repeated floods covering entire regions, particularly violent storms, temperatures playing yoyo ... Three examples of climate change already visible in France.

Our planet is sick and she shows us ... and this is only the beginning.

Indeed, the greenhouse effect, seriously exacerbated by human activity related to the burning fossil fuelsBegins to have serious consequences on the global climate. It is found that the average air temperature at ground level increased 0,6 ° C since the beginning of the century, and that heat records (recorded by man) are all concentrated in the last years. The historical temperature analyzes show a sharp increase in the average T ° from 1850 year, a few decades after the start of the industrial revolution and 1ère massive coal combustion.

changes in average temperatures in the northern hemisphere
the temperature evolution since the year 1000. Based on historical records (red), the growth of corals and trees and cores extracted from polar ice). Click on the image to enlarge.

Note: given the localized cooling of certain region, despite global warming (microclimates upheaval), the study of global average temperatures may not be representative of the global warming phenomenon. In fact the temperature at the North Pole has increased 2 from 1950 ° C. It's more than 0.3 ° C readable graphs on average temperatures. For an order of magnitude, the last ice age (there are 20 000 years) corresponds to a current average land temperature drop ... 5 ° C ...



Some rare scientists say that increasing the T ° is due to the sun would be in an active phase, it may be an aggravating consequence of rising temperatures currently recorded ... anyway the forcing property radiative carbon dioxide has long been known by scientists. The increase in average temperature is necessarily linked to increased concentration in CO2 (and other greenhouse gases often noted: GHG) in the atmosphere.

Indeed any finite energy by dissipating heat. A higher consumption of energy in a closed environment (earth's atmosphere) necessarily lead to a rise in average temperatures but would it be so high without GHGs? Nothing is less sure.

Other GHGs have much greater impact on the greenhouse effect that CO2 but fortunately, are largely unregulated. The CO2 is it in much larger quantity because after all fossil fuel combustion and was responsible for more than half of the greenhouse effect. 2 the following graphs clearly show the correlation between energy consumption (mainly in fossil form) and amount of carbon dioxide in the atmosphere.

changes in global primary energy consumption and forecasts
Changes in global energy consumption (Gtoe). Click on the image to enlarge. Source: World Energy Council

Evolution of carbon dioxide in the atmosphere and forecasts
Evolution of carbon dioxide in the atmosphere (GtC). Click on the image to enlarge. Source: World Energy Council

Note: changes following scenarios 5 roughly environmentalists (A Strong growth, current reference B, C ecologist) A1, A2 and A3 indicate more or less alternative to fossil fuels. (Source: World Energy Council). Click on the image to enlarge.

The scenarios are alarming given the population growth and development, the carbon content may double in the next 20 years with the dramatic consequences discussed below.

Fortunately as shown on this page, the industrialized countries are awareness of this serious problem and are setting emission reduction targets for international meetings (Kyoto in 1997, 2001 in Bonn). But these objectives be met? And punish those who do not respect? Here are the results and decisions from the Kyoto Protocol.

Anyway, it is mostly overlooked countries with large populations and emerging energy, such as China or India, it will take measure of pollution. Indeed if they will follow rightly under the principles of equality, our example of 19ième century by burning coal (energy the cheapest and most available) to excess, they will reject 30 years in many CO2 and pollutants than industrialized countries rejected since 200 years! The industrialized countries need to safeguard humanity, offer them energy solutions at reduced cost and emissions.


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