Greenhouse effect leads to global warming. Which substances are responsible for greenhouse effect ?
- Besides carbon dioxide, other greenhouse gases are methane, water vapour, nitrous oxide, oxides of sulphur, CFCs and ozone.
- Methane is produced naturally when vegetation is burnt, digested or rotted in the absence of oxygen. Large amounts of methane are released in paddy fields, coal mines, from rotting garbage dumps and by fossil fuels.
- Chlorofluorocarbons (CFCs) are man-made industrial chemicals used in air conditioning etc. CFCs are also damaging the ozone layer.
- Nitrous oxide occurs naturally in the enviroment but is increasing day by day by the human activities.