EVERYDAY SCIENCE

Detailed explanation-1: -natural sources, including volcanic eruptions, windblown dust, sea-salt spray and emissions of volatile organic compounds from plants.

Detailed explanation-2: -mobile sources – such as cars, buses, planes, trucks, and trains. stationary sources – such as power plants, oil refineries, industrial facilities, and factories. area sources – such as agricultural areas, cities, and wood burning fireplaces. natural sources – such as wind-blown dust, wildfires, and volcanoes.

Detailed explanation-3: -Photochemical smog is not a natural source of air pollution. It is mainly caused due to vehicle emissions and industrial fumes.

Detailed explanation-4: -Naturally occurring pollutants include ash, soot, sulfur dioxide, ground-level ozone (also known as smog), salt spray, volcanic and combustion gases, and radon. These pollutants are released during volcanic eruptions, forest fires, and grass fires.

Detailed explanation-5: -Context. India today is the world’s fourth most significant greenhouse gas (GHG) emitter – contributing 7.08 per cent of all global emissions1. Vehicular emissions. Carbon dioxide. Carbon monoxide. Nitrous oxide. Particulate matter. Who should care? 08-Dec-2021