Question

As proved by many studies, the greenhouse effect is rapidly increasing because of increase in the concentration of carbon dioxide. In the given graph, the increase in carbon dioxide concentration is shown. What could be $X$ corresponding to it?
(i) Rate of photosynthesis in plants
(ii) $pH$ of the oceans
(iii) Water level of ocean
(iv) Average global temperature of earth

• A. (i) and (iii)
• B. (ii) and (iv)
• C. (ii) only
• D. (iv) only

Answer 1

Answer: (C)

The recent phenomenon of global warming has been attributed primarily to increasing industrial $C{O}_2$ emissions into Earth's atmosphere. An estimated 3% of the $C{O}_2$ released by humans into the atmosphere dissolves into oceans, rivers and lakes which contributes to ocean acidification.

Hence, only (ii) is correct.