Use constraints
Using this graphic and referring to it is encouraged, and please use it in presentations, web pages, newspapers, blogs and reports.
For any form of publication, please include the link to this page and give the cartographer/designer credit (in this case UNEP/GRID-Arendal)
Source(s)
Earth Charter Initiative (earthcharterinaction.org/climate/2007/09/find_the_right_carbon_calculat.html#more );
Climate Outreach and Information Network (coinet.org.uk/materials/carboncalculations ); European Commission ( www.mycarbonfootprint.eu ).