Consider statements about environment: 1. Acid rain damages buildings and monuments. 2. Ozone depletion increases UV radiation. 3. Global warming is caused by a decrease in greenhouse gases. Which are correct? MCQ with Answer and Explanation

Acid rain, containing sulfuric and nitric acids, corrodes buildings, monuments (like the Taj Mahal), and statues made of limestone and marble. The depletion of the stratospheric ozone layer reduces its ability to absorb harmful ultraviolet (UV-B) radiation, increasing the amount reaching the Earth's surface. Global warming is caused by an increase, not a decrease, in atmospheric greenhouse gases (like CO2 and methane), which trap more heat. Thus, statements 1 and 2 are correct.