3. the clean water act established national ambient air quality standards required industries to reduce or eliminate point source pollution in surface waters required that pollution-control devices be installed on cars and trucks and at factories set maximum contaminant levels for drinking water

It required industries to reduce or eliminate point source pollution in surface waters.

after balancing the chemical equation, what are the coefficients for these compounds?

h2s      

⇒ 3

hno3    

⇒ 2

works for edg

chronological thinking is an indispensable tool to structure a historical narrative and to give meaning to a sequence of events. the final section presents the results of a survey to test the chronological thinking of lower secondary school students carried out by the educational research institute.