Environment–besides the tumble, the kick In the Avenue From São Paulo, the 15 hs the
thermometers indicated 30°C. Concrete buildings and glass reflected the Sun. The breeze was little. The 9 thousand vehicles that there pass per hour they are forced her they stop in at least one of the 15 traffic lights. In the roof of steel of the automobiles the
temperature is going to 50°C, in the mouth of the exhaust the smoke arises. In the Avenue From São Paulo, with 100°C the asphalt gives the impression of melting. For the pedestrians, there are lack of trees and shades, but the few kms of there, in the neighborhood of Morumbi, the pollution is smaller, and the index of planted trees reaches 47% of the territory. As result the thermometers mark 5°C on average less the. In the same day and in the same hour, in the south and in the north of the municipal district, where they are the
rural areas and of protection of springs, the temperature is of 20°C, 10°C unless in the center. The cientists of USP crossed the information collected by surface thermometers and for the Satellite Landsat 5. For the rising, the areas of
larger temperature are in the basin of Tietê. The substitution of green areas for constructions and for the paving it altered the capacity of absorption of the solar rays for the surface. Unlike the constructions, the vegetation absorbs and it liberates the solar radiation quickly through the perspiration process. Besides irradiating heat waves, the buildings reduce the circulation of the winds and the renewal of the air. The consequence of the
environmental degradation is the increase of the temperature medium low of 9 for 13 degrees in the last 50 years. Starting from the decade of 1940, there were the disordered growth and the lack of an environmental politics they took to a drastic reduction of the vegetation. Of the 870 km square of urban ranch, 2,9% only correspond to public green areas. The green index is of only 4,24 square meters for inhabitants. The suitable for OMS is 12; almost the triple. Meteorological variations provoked by the urbanization they begin evidencing in cities with more than 300 thousand inhabitants. Studies accomplished in Canada they concluded that these already present difference of 1°C among the average of the rural temperatures.
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