curb,windfall

Carbon Curbs Help Nuclear Industry
Nuclear-power operators stand to reap a multibillion-dollar windfall if U.S. restrictions on carbon-dioxide emissions take effect.

curb (CONTROL) Show phonetics
verb [T] to control or limit something that is not desirable:
The Government should act to curb tax evasion.

curb Show phonetics
noun [C]
You must try to put a curb on your bad temper/spending habits.

windfall (UNEXPECTED MONEY)