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sexta-feira, 6 de maio de 2011

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Global warming 'has reduced maize and wheat yields': SciDev.Net - serious humanity ecology crisis

http://www.scidev.net/en/

Global warming 'has reduced maize and wheat yields'

Yojana Sharma and Aisling Irwin

6 May 2011 | EN

Global warming has already reduced the global yields of key crops, say scientists.

Maize and wheat production have been 3.8 and 5.5 per cent lower, respectively, than they would have been without the temperature rises associated with climate change since the 1980s, according to the statistical analysis.

Rice and soya yields have dropped in some parts of the world and risen in others, so overall the warming has not changed their net global production.