According to the lesson, which of the following decades was nicknamed "The Decade of the Environment"?

what are local authorities doing to fix the problem

explanation:

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.

treaties

explanation:

c or d both can be the answer