UPSC Prelim 2025 Paper I

The World Bank warned that India could become one of the first places where wet-bulb temperatures routinely exceed 35°C. Which of the following statements best reflect(s) the implication of the above-said report? I. Peninsular India will most likely suffer from flooding, tropical cyclones and droughts. II. The survival of animals including humans will be affected as shedding of their body heat through perspiration becomes difficult. Select the correct answer using the code given below.

Verified Answer
A. I only
B. II only
C. Both I and II
D. Neither I nor II

Explanation:

A wet-bulb temperature (WBT) of 35°C is considered the theoretical limit of human survival. At this temperature, the air is so hot and humid that the body cannot cool itself by evaporating sweat, leading to heatstroke and potentially death. I. Statement I describes broader climate change impacts. While these are related to global warming, the specific warning about wet-bulb temperatures exceeding 35°C primarily highlights the physiological threat to life, not directly these weather phenomena as the *best reflection* of the WBT warning. II. Statement II directly addresses the core implication of high wet-bulb temperatures. When WBT exceeds 35°C, the body's ability to shed heat through perspiration becomes severely compromised, directly threatening the survival of humans and animals. This is the most accurate and direct implication of the report. Therefore, 'II only' best reflects the implication.