Conduct
research on the impact of drought on people, the economy and the environment.
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The difference(s) between the grand canyon and valles marineris is/are: (a) the grand canyon was formed by water, but valles marineris was not. (a) valles marineris is much longer than the grand canyon. (c) valles marineris is much wider than the grand canyon. (d) valles marineris has large volcanoes near it. all of the above

Most of earths fresh surface water is found in

Which barrier to economic development is shown in the following examples?