Option 1: Burning of petrol is a major source of air pollution as it releases harmful gases and particulate matter into the atmosphere. This contributes to the greenhouse effect and destruction of the ozone layer.

Option 2: Use of solar energy does not cause pollution. Solar energy, which is derived from the sun`s rays, is a clean source of power that does not emit any harmful pollutants into the environment. It is a sustainable and renewable energy source that can be used to generate electricity and heat without negatively impacting the air, water, or soil.

Option 3: Burning of rubber produces toxic fumes and releases harmful chemicals into the air. This can lead to air pollution and contribute to respiratory issues.

Option 4: This option is incorrect as burning of rubber and petrol both cause pollution, while the use of solar energy does not.

Therefore, the correct answer is option 2, as the use of solar energy does not cause pollution.