Question

Which are visible pollutants known to you

Answer 1

This belongs to particulate emissions that have been known as visible pollutants. It can be inhaled into the nose and lungs. Some of the visible pollutants are listed as nitrogen oxides, sulfur dioxide, volatile organic compounds, carbon monoxide and others.
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Answer 2

Carbon monoxide, is an invisible air pollutant and is released into the air when fossil fuels such as coal, oil and gas are burned.
Nitrogen dioxide is a brown gas that comes mostly from cars and trucks that burn fossil fuels, plants that make electricity, and burning wood. Breathing nitrogen dioxide in the air makes people's lungs irritated. A similar type of pollution, nitric oxide, creates haze. It damages plants and makes materials like fabric and metal wear apart easily.
Ground-level ozone, a harmful type of ozone, forms in the air when sunlight interacts with nitrogen oxides, which are released from factories, and organic compounds, which are released naturally from plants. Ozone near the ground is not beneficial like the ozone layer in the stratosphere, and is a major part of smog.
Ultrafine aerosols are tiny particles in the air. They are released from cars, trucks, and power plants. When people breath aerosols, the particles travel deep into their lungs and the tissue of the lungs can become inflamed.

Or
Factories disposal, Vechiles pollution by means of it harmful smoke..
Burning of waste disposal like plastic.. and soon
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