Which of the following is not a potential consequence of a global increase in average temperature?
A – Increased drought
B – Increased species extinction
C – Increased hurricane strength
D – Increased agricultural yield
The Correct Answer and Explanation is:
The correct answer is D – Increased agricultural yield.
Explanation
A global increase in average temperature, often attributed to climate change, has various environmental and societal impacts. While some regions may initially experience increased agricultural yields due to warmer temperatures and a longer growing season, the broader implications of climate change are likely to be detrimental to agriculture overall. Here’s a detailed look at the potential consequences:
- Increased Drought (Option A): As global temperatures rise, evaporation rates from water bodies increase, leading to reduced soil moisture and drought conditions. These conditions can significantly affect crop yields, particularly in regions already susceptible to water scarcity. Increased drought frequency and severity can devastate agricultural practices, leading to lower productivity and economic losses.
- Increased Species Extinction (Option B): Rising temperatures can disrupt ecosystems and habitats, causing species to migrate to cooler areas or adapt to changing conditions. Many species may not adapt quickly enough to the changing climate, leading to a higher risk of extinction. Loss of biodiversity can have cascading effects on ecosystems, including reduced resilience to environmental changes.
- Increased Hurricane Strength (Option C): Warmer ocean temperatures fuel more intense hurricanes and storms. This phenomenon occurs because warmer water provides more energy to tropical storms, increasing their strength and destructiveness. The increased frequency and intensity of hurricanes can lead to significant property damage, loss of life, and disruption of agricultural activities.
- Increased Agricultural Yield (Option D): While some areas might initially see a benefit in crop production due to warmer temperatures, overall agricultural yield is expected to decline as climate change progresses. Factors such as increased heat stress on crops, water scarcity from prolonged droughts, and altered pest dynamics negatively impact agricultural productivity. Moreover, extreme weather events and changing precipitation patterns threaten food security on a global scale.
In summary, while a global increase in average temperature may create isolated conditions for increased agricultural yield in certain regions, the overall impact of climate change on agriculture is expected to be negative, making D the correct answer.