The scientific view is that the increase in global temperature should not exceed 2°C above the pre- industrial level. If the global temperature increases beyond 3°C above the pre-industrial level, what can be its possible impact/impacts on the world? 1. The terrestrial biosphere tends toward a net carbon source. 2. Widespread coral mortality will occur. 3. All the global wetlands will permanently disappear. 4. Cultivation of cereals will not be possible anywhere in the world. Select the correct answer using the code given below:

Question

YESPYQ · Accepted Answer

Correct answer: 1 and 2 only. Statement 1 is correct: If the global temperature in- creases beyond 3 °C above the pre-industrial level, the terrestrial biosphere will tend towards being a net carbon source. Taiga and temperate forests act as an important carbon sink that would turn into a carbon source. Statement 2 is correct: As temperatures rise, mass coral bleach- ing events occur. If the temperature keeps on rising, widespread coral mortality will occur. Statement 3 and 4 are incorrect: The temperate regions can still survive if the temperature increases. The temperate zones are where the widest seasonal changes occur. The vegetation can survive there. The weather should be warm and moist during the early stage of the growth of cereals. Therefore, the cultivation of cereals would still be possible if the temperature rises. 108

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