[al gore] may drive a [hybrid] and rant about [global warming], but when you factor in the cooking grease burned to cook his food, his carbon footprint is pretty huge
the amount of greenhouse gases released by a person, group, or machine
"[al gore] may drive a [hybrid] and rant about [global warming], but when you factor in the cooking grease burned to cook his food, his carbon footprint is pretty huge" What is the definition of "carbon footprint"?