The main reason for the issue of global warming is the emitting of green house gases in huge amounts. Especially carbon dioxide. So if we can control the emission of these gases to atmosphere we will be able to control the issue of global warming.
Carbon Dioxide is emitted to atmosphere mainly by the combustion of hydrocarbons, in order to generate energy. If we can move towards more clean technology like solar power then we will be able to control global warming for some extent.
Naturally there is a mechanism to control the amount of Carbon Dioxide in atmosphere and it is called photosynthesis. As the amount of forests in the earth is depleting rapidly this natural process of carbon dioxide absorption is weakened. Hence we need to protect our forests in order to solve this issue.
After all the attitude of people is very critical. If they can live a simple life style it will be the key path to the solution