Complex sentence: The National Mineral Policy of India, 2008 rules that any abandoned mine "should be made richer than what it was before" through refilling the craters and reforestation, but most miners leave their abandoned mines in a state of utter decay and toxicity.
Split into simpler sentences: The National Mineral Policy of India, 2008 rules that any abandoned mine'should be made richer than what it was before' through refilling the craters and reforestation. But most miners never adhere to this clause and leave the dead mines in a state of utter decay and toxicity.