Question

read the text. congress passed the clean water act of 1972 to address the serious environmental crisis of water pollution. in new yorks hudson river, levels of toxic bacteria were 170 times the level considered safe. oil floating on the the cuyahoga river near cleveland, ohio, burst into flames in 1969. factories were dumping pollutants into waterways, untreated sewage flowed directly into rivers, and untold numbers of fish were dying. the clean water act restricted discharges of pollution into the nations waters and authorized the environmental protection agency to enforce water quality regulations. it also provided money for sewage treatment plants. although the work to clean up the nations lakes and streams is ongoing, water quality today is much better than it was in the 1960s. which organizational structure does this text primarily use? sequential compare - contrast problem - solution

Explanation:

The text first describes the problem of water - pollution (toxic bacteria in the Hudson River, oil fires in the Cuyahoga River, etc.). Then it explains the solution, the Clean Water Act of 1972, and its effects.

Answer:

problem - solution