Long Term Effects on Agriculture Are Negative

If the effects of climate change are not abated, even production in the mid- and high-latitude regions is likely to decline in the long term (end of 21st century) (Figure 10.5). These results are consistent over a range of temperature, precipitation, and direct CO2 effects tested, and are due primarily to the detrimental effects of heat and water stress as temperatures rise. While the beneficial effects of CO2 will eventually level out, the detrimental effects of warmer temperatures and greater water stress will be progressive in all regions.

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