Global warming will affect agricultural productivity adversely in regions where the food needs are the greatest.

Global warming will affect agricultural productivity adversely in regions where the food needs are the greatest. A one degree rise in global temperature will curtail the growing season by a week in Punjab, he said. “You lose one week of growing period, you lose nearly 400 kg of wheat per hectare. We have calculated 6 million tones per year will go down in the northern part of India. International Food Policy Research Institute has estimated that food production in south Asia will decrease by 44 per cent by 2050, if adaptation measures are not put in place.