How and why are there city states in mesopotamia?

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

Residents of moldova are mainly a. russian b. ukrainian c. serbian d. romanian the answer is d. romanian

What does the kyoto protocol aim to reduce