"The 1960s was the decade ______ many people first started paying attention to environmental issues."
when
"A corporation ______ factories pollute the air must pay large fines."
whose
Identifying or non-identifying? If you can also tell me the exact words in the relative clause, I'll give you 10 bonus points. "Geothermal energy, which is sourced from the earth's heat, is a good alternative to fossil fuels."
non-identifying
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