An oil refinery is poisoning the air in Colorado due to poor maintenance and inspection, according to a new report from federal environmental regulators. But instead of devoting money to deal with the problems, the refinery’s owner, Suncor Energy, has massively increased payouts to shareholders — at the urging of one of the world’s largest hedge funds.

The case illustrates how Wall Street’s investments in fossil fuels directly threatens the health of local residents and, in particular, vulnerable populations.

The Canadian oil and gas giant Suncor has made headlines in recent years for a series of chemical releases and air quality violations at its ninety-two-year-old refinery just outside Denver. In its new report, the Environmental Protection Agency (EPA) found that the problems are systemic.