Over a global scale global warming is basically caused by the pollutants and emissions introduced by the burning of fossil fuels.
This consists of most of the conventional sources of energy like wood, coal and fat. Every individual person adds to this effect and is called your carbon footprint.
Building good use of alternative solar energy power may get quite a distance towards reducing the measurement and influence of your carbon footprint not to mention the environment benefits from every person that puts home solar technology within their properties with huge gains. If you want to read more about solar