Is amethyst hard to find
yes/no? where? why?

Does anyone know the answers for these

Hey, i was what is consisted in a sustainable city? like what unique designs they have, etc. for answering ; )

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