Itseasiassa väestökeskuksissa hiilijalanjälki per asukas on pienempi koska parempi infra, julkinen liikenne, tehokas jätehuolto, tehokkaampi lämmön/sähkön siirto, jne.
"The average emissions in New York City are about 30 percent less than the U.S. average," said Dodman. "This is because the primary factors contributing to individuals' greenhouse gas emissions are their use of energy and transportation. New York City residents tend to have smaller dwellings than the average American, so their heating needs are less, and they are also more reliant on public transportation."