After the pollution of oil and fossil fuels.
The burning of oil as we know it today poses serious environmental problems, as it releases into the atmosphere, in large quantities, products harmful to the ecosystem and to the planet. The "absorption" capacities of the planet would be exceeded since the beginning of the 90 years and the last disturbances, some speak of climatic aberrations, testify the uneasiness of our planet.
Some scientists, in a minority, formulate "cyclic" or external explanations; while the link between pollutants and the greenhouse effect is clearly established. Even if the link between natural disasters and the greenhouse effect remains to be proved, common sense is enough to see that the favorable balance (extremely rare in the Universe) of our planet is dangerously disruptive.
Today is all this global balance is threatened by the polluting fossil fuels which spewing products that the earth had absorbed over millions of years. Indeed, fossil fuels are buried natural carbon reserves in the ground, and as is the carbon memory of the earth. It took 400 million years the Earth to create these oil reserves and less than 200 years to man to exhaust, ie instantaneously in geologic time.
These gaseous discharges directly pollute the man who breathes and indirectly the planet; with, in 2 cases, serious consequences already visible and whose importance can not, unfortunately, get worse given the current developments. This along with medical and social costs incurred considerable. In the case of France, these costs will amount to thousands of times the funding for remediation and research in new energy.
direct pollution: example of the city of Strasbourg (see Complete study of new urban transport )
Urban centers cover most of human activity and population in developed countries. Development (demographic and economic) of these urban centers induces an ever higher energy requirement. We limit ourselves to the example of transport to translate this congestion, spatial and environmental cities.
According to surveys conducted by the authorities, on July 2000, there are about 2 Million vehicle km traveled per day on strasbourgoise agglomeration. This represents the equivalent of 5 fuel tankers consumed per day and the following amounts of pollutants:
|Quantity in tonnes||1.907||267.037||0.724||0.297||0.054|
These amounts were calculated from the emissions in g / km of a Renault Clio (diesel and gasoline) 1999 model having traveled 3000km and on a basis of an auto park consists of 50% Diesel vehicles and vehicles 50% essence.
According to the preventive cost on CO2 (see Estimating the cost of pollution CO2), the 270 tonnes per day represent a virtual preventive cost eniron 50 000 francs per day, about 18 millions of francs annually.
If the efforts of manufacturers and oil, these 10 recent years have greatly reduce the amount of sulfur oxides (80% decrease) and lead (95% decrease) in the air of cities, we see clearly by these figures that city air is still heavily saturated, and the constant increase of the fleet does not help. Nevertheless many technological solutions exist or are being developed to decongest air space and cities.
Direct consequences of the pollutants from the burning of fossil fuels on the man. Click to enlarge
Many studies are conducted by various hospitals and medical facilities on the health consequences of chronic exposure to various pollutants. The results of these studies are obviously not disseminated to the general public for obvious reasons, but it is now certain is that the city pollution kills more people than accidents on strasbourgoises agglomeration, per year, there are for the year 2000 500 about premature deaths due to pollution twice the victims (direct) by accident. Evidemement they are the weakest (children in low-age, elderly, asthmatics) which affected the raw. But today no one can estimate the influence of chronic urban pollution on the life of the people.