By signing the kyoto protocol, a country commits to decrease its greenhouse gas emissions. which ecological issue does this protocol address?
a) over population
b) water scarcity
c) loss of biodiversity
d) climate change

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