Q. Consider the following statements regarding rise in temperature:
1.A rise in temperature of 1 to 3 degree Celsius will have positive effect on cereals in low latitude areas.
2.Warming of more than 3°C is expected to have negative effect on production in all regions.
Which of the statements given above is/are correct?

[A] 1 only

[B] 2 only

[C] Both 1 and 2

[D] Neither 1 nor 2

Answer: B
Notes:

Explanation: Climate Change can affect crop yield as well as the types of crops that can be grown in certain areas, by impacting agricultural inputs such as water for irrigation, amounts of solar radiation that affect plant growth, as well as the prevalence of pests.

  • Rise in temperatures caused by increasing greenhouse gases is likely to affect crops differently from region to region.
  • For example, moderate warming (increase of 1 to 3°C in mean temperature) is expected to benefit crop yields in temperate regions, while in lower latitudes especially seasonally dry tropics, even moderate temperature increases (1 to 2°C) are likely to have negative impacts for major cereal crops.
  • Warming of more than 3°C is expected to have negative effect on production in all regions.

Source: SHANKAR IAS Environment