ślad węglowy

Back in 2000, few people were talking about carbon footprints.

However, a new focus over the past 12 months has been the carbon footprint of the paper we use.

So you have a carbon footprint, everybody does, perhaps it is already very low.

Want to know what you can do to reduce your carbon footprint?

Each year we work to further reduce our carbon footprint.

I also agree that we should all lower our carbon footprint.

No need to waste energy or water and what a carbon footprint!

I think we can not only reduce our carbon footprint but have fun too!

The industry itself estimated its carbon footprint at 3.3% in 2007.

The words "carbon footprint" are often seen in the news.