New Hampshire recently became the third state to adopt mandatory controls on carbon emissions from power plants.

Industry groups have sought a trading system, arguing it is more efficient than uniform mandatory controls.

But he left no doubt that he believes mandatory controls on emissions of carbon dioxide, the main greenhouse gas, are necessary and inevitable.

A modified vehicle in this way may not pass mandatory anti-smog controls.

Six Republicans joined Democrats in backing the measure, breaking ranks with the Bush administration, which opposes mandatory controls.

The day before, President Johnson had imposed mandatory controls on corporate transfers of dollars overseas.

Four major bills have recently been offered in the Senate calling for mandatory controls on carbon dioxide, the main global warming gas.

He added that he hoped that "some limits on acreage" would avoid mandatory controls.

Two years in the making, the plan is the first collective effort in America to adopt mandatory controls for greenhouse gases.

He said the United States must agree to mandatory controls on the sulfur-dioxide emissions that contribute to the problem.