The theory of aging holds that the more engaged people are, the more likely they are to be satisfied with life.

Because global warming is occurring and there’s no ice for the polar bears to live on.

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 !