Informal assessments are best described as ?

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

How are farmers that use no plow farming methods able to improve air quality for the people around the fram

What is the difference between emigrate and immigrate? ?