Indiana has lost a challenge to new federal pollution rules holding states responsible for smog and soot emissions that cross state lines.
Indiana had joined Texas and 12 other states in a lawsuit arguing the E-P-A regulation violates the Clean Air Act by not giving states a chance to calculate how much pollution they‘re responsible for.
The rule instead parceled out responsibility among states through a formula based not on the amount of emissions but on cost.
A federal appeals court sided with the states, but a 6-2 Supreme Court majority ruled calculating state-by-state
emissions precisely is both impossible and a step beyond what the Clean Air Act requires.