Obj 4.13

1. Human activities i.e burning of fossil fuels results in the formation of CO2/NO2/ SO2 (greenhouse gasses)
They absorb infer red light and they will redistribute it back towards the planet
Fossil fuels from factories (industrial) and vehicles and burning of coals (domestic)
2. Farming. –Cows admit ethane gas into atmosphere (Around 9% of greenhouse gasses)
3. Evaporation of water  water vapour (Clouds)
4. Refrigeration/ Solvents/ propellants.
CFC (Chlorine, Florine, Carbon) i.e CCL3F