There are many causes of golbal warming.

Most important causes are :-

1. Deforestation

2. Domestic cooking

3. Industrilization

4. Burning of fossil fuels

5. Respiration/breathing of living organism

6. AIR ,LAND AND WATER Pollution

7. Themal power plant 

8. Cultivation of land 

9. Decay of dead organism

10. Eruption of volcanoes