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Dear Student 9 ) .Increasing air pollution has posed a threat to the beauty of the Taj Mahal. Excessive poisonous gases and smoke has started to discolour (yellowing) the white marble of the Taj Mahal. Acid rains due to increasing air pollution has started corroding the marble, thus making Taj Mahal lose its beauty. 10).Global warming is a slow and steady rise in Earth's surface temperature. Temperatures today are 0.74 °C (1.33 °F) higher than 150 years ago. Many scientists say that in the next 100–200 years, temperatures might be up to 6 °C (11 °F) higher than they were before the effects of global warming were discovered. Regard