Environmental pollution is the effect of undesirable changes in our surroundings that have harmful effects on plants, animals and human beings.
A substance which causes pollution is known as a pollutant.
Tropospheric pollution occurs due to:
- Gaseous air pollutants
- Oxides of sulphur
- Oxides of nitrogen
- Oxides of carbons, etc.
- Particulate air pollutants
- Smog, etc.
Stratospheric pollution occurs due to chemicals like CFCs breaking down the ozone causing ozone hole.
Causes of water pollution:
- Pathogens: These are the disease causing agents like bacteria and other organisms.
- Organic wastes: Organic matter such as leaves, grass, etc. also lead to water pollution.
- Chemical pollutants: These include heavy metals, acids, industrial wastes ,etc.
- Soil erosion
Green chemistry is a way of thinking and is about utilising the existing knowledge and principles of chemistry and other sciences to reduce the adverse impact on environment. Green chemistry is a production process that would bring about minimum pollution or deterioration to the environment.
Green chemistry in day-to-day lives
- Dry cleaning of clothes
- Bleaching paper
- Synthesis of chemicals