What impact did the Royal Proclamation of 1763 and the Treaty of Peace and Friendship of 1760 have on First Nations peoples?

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

Which two nations are doing the most to combat their environmental issues?

What are the 28 countries in the eu?