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Colorado seeks more regulation of Suncor refinery to reduce harmful pollution

The process to create new rules has begun, but it could take years before they’re in place

	Suncor’s Commerce City refinery emits black smoke after maintenance

	Power outage forces Suncor refinery in Commerce City to restart, spew black and yellow smoke

	Suncor’s Colorado refinery records more malfunctions than comparable facilities, EPA study finds