Grain output affected by warming

“All the grains we grow are beyond their thermal maximum. For every degree Celsius [that mean global temperature] increases, yield drops 10 percent,” notes geochemist Wallace Broecker of Columbia University’s Earth Institute. “In the meantime, population is going up by 30 percent. With three degrees [Celsius] warming, it’s 30 percent down in grain and 30 percent up in population, then you’ve got a big problem.”

via How Can Humanity Avoid or Reverse the Dangers Posed by a Warming Climate?: Scientific American.

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