The 1972 aimed to reduce water pollution in the United States.

answer; /// i believe that the correct answer is (d)the huang he river valley;

yes

explanation:

the fighting words doctrine, in united states constitutional law, is a limitation to freedom of speech as protected by the first amendment to the united states constitution. in 1942, the u.s. supreme court established the doctrine by a 9–0 decision in chaplinsky v. new hampshire.

the answer is heceta and bodega y quadra. i hope i you with this question!

the viking voyages took place during the middle ages, which was about this time. 500 to 1350. the viking voyages took place during the middle ages, which was about this time.