The Supreme Court's decision is the latest in which conservative justices have reined in pollution control efforts.

The Supreme Court's conservative majority ruled for San Francisco in limiting the power of environmental regulators to prevent ocean discharges of polluted stormwater.

The conservative Supreme Court aligned with liberal San Francisco on Tuesday, ruling that federal environmental regulators overstepped their authority by attempting to impose vague limits on how much raw sewage the California city may pump into the Pacific Ocean.