Question

3. What is ozone layer? Write its importance.

4. What is acid rain? How does it affect Taj Mahal.

5. What is the aim to say ;say not to crackers​

Answer 1

• Ozone protects the Earth from harmful ultraviolet (UV) rays from the Sun. Without the Ozone layer in the atmosphere, life on Earth would be very difficult. Plants cannot live and grow in heavy ultraviolet radiation, nor can the planktons that serve as food for most of the ocean life.

• The acidic gases such as SO2, SO3 and NO2 react with water vapor present in the atmosphere or with rain water to give sulfuric and nitric acids. These acids react with the marble of the Taj Mahal to form calcium sulphate and calcium nitrate.