The carbon footpring

The carbon footprint is a "measure of the impact that human activities have on the environment in terms of the amount of greenhouse gases produced, measured in units of carbon dioxide". The carbon footprint could be calculated in most of website that concerned in environment such as http://footpringt.wwf.org.uk or http://www.myfootpring.org. You will go through multiple choice questions that ask you about your activities and your usual food and how your house got the electricity and estimate your carbon footprint. It also shows you the most three category that produces carbon. Moreover, it gives you some advises about how you can reduce your emission.
The three ways I contribute most to greenhouse gases are my eating habit and the way I live. Therefore I should maintain my eat habit and my lifestyle.