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Cultures across large fertile areas of North America and Europe, would send a small percentage of sunlight and heat into space. Different strains of crops like wheat have very different levels of reflexivity, or albedo, say scientists. Choose which reflects most summers in Europe, more than 1 percent cooler to do, they say. Lead researcher Dr. Joy Singarayer, University of Bristol, said:''Our present studies on the reflectivity of the crops at an early stage, but our initial results are very encouraging because they suggest that simply by choosing specific plants strains of crops, we can make the reflectivity of large tracts of land, and significantly reduce local temperatures.

The concept of using reflectivity increases climate deal is in fact an old one - the human race for centuries institutions painted white reflects the sun and keep cool. We can now take advantage of opportunities to do so on a much larger scale on our plantations. The findings were released today in London at the Royal meeting for discussion Society''géoingénierie - take control of our planet's climate. Arable land for more than 10 percent of global land use, scientists said. Particularly dense agricultural areas cover Europe, North America and South Asia.

A simulation of global climate computer is used to determine the potential of plantation crops with high reflectivity evaluation. The study showed an increase of 20 percent of the albedo of crops could provide Europe with an average summer cooling over 1 percent. It was a fifth of the changes needed to compensate for a doubling of atmospheric carbon dioxide in the next century. In a scenario of global warming is more moderate, the method can offset half the predicted hot summer Europe.