See U.K. Carbon Footprint thoughts..
As we live our lives, we use resources to heat and light our homes, travel and even to produce our food.
When power stations create that power for us to use, they produce gases as waste. One of them is called carbon dioxide, and a number of experts are convinced it plays a big part in climate change.
Reducing the amount of carbon dioxide people - and countries - around the world use up is seen as a key way to reduce climate change.
To help individuals reduce the amount of carbon dioxide they are responsible for, a way of measuring it was created.
It's called a carbon footprint, and the more a person produces, the larger their carbon footprint is said to be.
It's not just about electricity and gas though.
See more... http://news.bbc.co.uk/cbbcnews/hi/newsid_8400000/newsid_8403300/8403327.stm