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Climate change will mitigate crop yields drastically, says study

The report says that climate change will effect key crops such as rice, wheat and maize.

Climate change will mitigate crop yields drastically, says study

New Delhi: According to a major scientific report, climate change will have a negative effect on the crop yields and reduce them drastically.

The report says that this will effect key crops such as rice, wheat and maize.

Experts analyzed previous research that used a variety of methods, from simulating how crops will react to temperature changes at the global and local scale, to statistical models based on historical weather and yield data, to artificial field warming experiments.

All these methods "suggest that increasing temperatures are likely to have a negative effect on the global yields of wheat, rice and maize," said the report in the Proceedings of the National Academy of Sciences, a peer-reviewed US journal.

"Each degree Celsius increase in global mean temperature is estimated to reduce average global yields of wheat by six percent," said the report.

Rice yields would be cut by 3.2 percent, and maize by 7.4 percent for each degree of Celsius warming (almost two degrees Fahrenheit), it added.

"Estimates of soybean yields did not change significantly."

These four crops are key to the survival of humanity, providing two-thirds of our caloric intake.

Changing temperatures would likely cause yields to rise in some locations, said the report.

But for the most part, the overall trend planet-wide is downward, signaling that steps are needed to adapt to the warming climate and feed an ever-expanding world population.

(With Agency inputs)

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