Question 14 Air pollution levels in Mexico City are significantly greater than in other areas of Mexico because the city is
A sparsely populated.
B
situated at a low altitude.
C
surrounded by mountains.
D
located far from major waterways.

To solve their problems, mesopotamians used irrigation, a way of supplying water to an area of land. to irrigate their land, they dug out large storafe basins to hold water supplies these ditches brought water to the feilds. to protect their feilds from flooding, farmers built up the banks of the tigris and euphrates.hope ths !