What is a carbon footprint? (Climate Change)

http://www.carbonfootprint.com/carbonfootprint.html 
( The website also teach you how to calculate your carbon footprint. Go and try it! It's fun! )

Before this research: What is a carbon footprint? Footprint with carbon dioxide? I know nothing about carbon footprint.

What have i learnt through this research: I learnt that carbon footprint is a measure of the impact our activities have on the environment, and in particular climate change.It relates to the amount of greenhouse gases produced in our day-to-day lives through burning fossil fuels for electricity, heating and transportation and other activities that using electricity.
We can reduce our carbon footprint by:
( Conservation of Electricity) Turn off all the electronic devices when not in use.
( Conservation of water ) Not to use clean water to wash the floor or planting. You can collect rain water. Use water wisely.