Rise in CO2 could restrict growing days for crops
22 Jun 2015
By TIM RADFORD.- While plants in temperate zones may benefit from higher temperatures, global warming’s impact in the tropics threatens catastrophe for food security.
Some tropical regions could lose up to 200 growing days a year, and more than two billion rural people could see their hopes wither on the vine or in the field. Even in temperate zones, there will be limits to extra growth.
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