Which of the following is used in aerosols?

Use of chlorofluorocarbons is not encouraged because

Which of the given statements are correct, when carboxyhaemoglobin reaches $3-4 \%$ in blood?
$(I)$ Leads to headache
$(II)$ Results in cardiovascular problems
$(III)$ Increases the body temperature
$(IV)$ Leads to diarrhoea

Statues and monuments in India are affected by acid rain. How?

Which of the following processes consumes $CO_2$ and is therefore least responsible for global warming?

Which of the following industries generate non-biodegradable wastes?