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Harvested area increased by 19%.
Quite significant, IMO. Last night (9/23/2020), the local (MN) news showed average temps in MN were up four degrees Fahrenheit since 1970.

Plus the higher levels of carbon dioxide boost plant productivity and reduce water use. Looking a four major crops (wheat, corn, rice and soybeans) Mariani modeled five global food scenarios and compared global production to today's levels. Included were two future scenarios, one with 560ppm of CO2 and a 2 degree temperature increase, the other with 800ppm and 4 degrees.

Relative Percent
Glacial 49%
Pre-industrial 82%
Current 100%
560ppm + 2°C 115%
800ppm + 4°C 124%

Carbon plants nutrition and global food security

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