4.13 - Greenhouse Gases

- Burning of fossil fuels releases CO2, NO2 and SO2. 
- CO2 and NO2 are Green house gases. 
- SO2 absorbs infrared 
- released from factories and vehicles (industrial) and burning of coals (domestic) 


- Farming - cows emit methane gas (CH4) - about 90% of the atmospheric gas. Huge amount


- Evaporation of water - forms water vapour  - clouds significant contributor to the greenhouse effect. 


- Refrigeration/ Solvents - CFCs - Carbon, Fluorine and Chlorine - absorption of UV light and catalytic break down