There are many causes of global warming. The most important causes are:-

1. Deforestation

2. Domestic cooking

3. Industrialization

4. Burning of fossil fuels

5. Respiration/breathing of living organism

6. AIR,LAND AND WATER Pollution

7. Thermal power plant 

8. Cultivation of land 

9. Decay of dead organism

10. Eruption of volcanoes