Pollution is the introduction of harmful materials into the environment. These harmful materials are called pollutants. Pollutants can be natural, such as volcanic ash, or can be created by human activity, such as trash or runoff produced by factories. Pollutants damage the quality of air, water, and land.
Air pollution is the contamination of air due to the presence of substances in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials.
Sources and Pollutants:
Vehicular: Release of pollutants like carbon monoxide (CO), nitrogen oxides (NOx), hydrocarbons, and particulate matter from cars, trucks, and buses.
Industrial: Emissions from factories and power plants, including sulfur dioxide (SO2), nitrogen oxides, and particulate matter.
Burning Garbage: Releases smoke, ash, and harmful gases like dioxins and furans.
Brick Kilns: Emit black carbon, sulfur dioxide, and particulate matter.
Thermal pollution is the degradation of water quality by any process that changes ambient water temperature. A common cause is the use of water as a coolant by power plants and industrial manufacturers.
Biomedical waste is any kind of waste containing infectious (or potentially infectious) materials. It may also include waste associated with the generation of biomedical waste that visually appears to be of medical or laboratory origin.
Examples: Used and discarded needles, syringes, soiled dressings, body parts, diagnostic samples, blood, chemicals, pharmaceuticals, medical devices, and radioactive materials.
Greenhouse Effect and Global Warming: The trapping of heat by greenhouse gases (like CO2) in the atmosphere, leading to a gradual increase in the Earth's average temperature (global warming).
Greenhouse Effect vs. Global Warming
The Greenhouse Effect is a natural and necessary process that keeps Earth warm. Global Warming is the intensification of this effect due to human-induced emissions, leading to climate change.
This causes climate change, rising sea levels, and extreme weather events.
Acid Rain: When pollutants like sulfur dioxide and nitrogen oxides react with water in the atmosphere, they form acids that fall to the Earth as acid rain. Acid rain damages forests, soils, and aquatic ecosystems.
Ozone Layer Depletion: The thinning of the ozone layer in the stratosphere due to the release of chemicals like chlorofluorocarbons (CFCs). The ozone layer protects us from the sun's harmful ultraviolet (UV) radiation.
"Swachh Bharat Abhiyan" (Clean India Mission) is a national campaign launched by the Government of India in 2014 to clean up the streets, roads, and infrastructure of India's cities, towns, and rural areas. The campaign aims to achieve the vision of a 'Clean India' by 2nd October 2019, the 150th birth anniversary of Mahatma Gandhi.