carbon footprint

pops

Registered User
Messages
75
I have just tried to calculate this on two different websites (change.ie and carbonfootprint.com) with totally differing results. I don't understand how they can be so different. Very annoying.
 
How about... (highlighting is mine):

www.change.ie FAQ:
and



www.carbonfootprint.com
So - it's just a rough estimate based on totally different data sources?