By Mark Sherman
Washington, D.C. (AP)

The Supreme Court ruled April 1 that the government can weigh costs against benefits in deciding whether to order power plants to undertake environmental upgrades that would protect fish.

The court’s 6-3 decision is a defeat for environmentalists who had urged the justices to uphold a favorable federal appeals court ruling that could have required an estimated 554 power plants to install technology that relies on recycled water to cool machinery.