A 1972 agreement between Canada and the United States reduced the amount of phosphates that municipalities had been allowed to dump into the Great Lakes.
- reduced the amount of phosphates that municipalities had been allowed to dump
- reduced the phosphate amount that municipalities had been dumping
- reduces the phosphate amount municipalities have been allowed to dump
- reduced the amount of phosphates that municipalities are allowed to dump
- reduces the amount of phosphates allowed for dumping by municipalities
Highlight to see answer: A
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