Explanation

Global dimming refers to the observed decline in solar radiation reaching the Earth's surface since the mid-20th century, caused by increased atmospheric particulates (aerosols) from pollution. These particulates scatter and reflect sunlight back into space, which produces a cooling effect — a fall of temperature — partially offsetting greenhouse warming. It does not raise atmospheric pressure or temperature. The answer is (D). (Cross-checked with Testbook's CDS-I 2024 solutions.)