Question

What is the main causes of global warming

Answer 1

The main reason is;
Release of Pollutants like SO2, CO2,NO2. which reflects the IR rays back to the earth instead of allowing them to pass through them and creates heating effect . These are released through various ways.

Answer 2

The main cause for global warming is increase in pollution which increases the concentration of carbon monoxide n carbon dioxide which doesn't pass out through the ozone layer n comes back to the earth n the temperature of the earth increases....
I hope it helps....