Which fossil fuel produces the most carbon dioxide?

coal
natural gas
oil
nuclear energy

How does central place theory explain patterns in the size and distribution of cities?

Mexico city is an example of how humans alter their environment because it was a. one of the world’s largest cities b. built on drained and filled lake beds c. built after conquest by the spanish d. once the capital of the aztec empire

What is the pattern of urbanisation around the word?