If I waste more electricity,
If I spend more money,
If I stay at home,
If I don't turn off the lights,
If the electricity is more expenxive,
If I don't have money to go out,
I'll stay at home.
the electricity bill will be more expenxive.
I'll waste more electricity.
I won't have money to go out.
I'll spend more money.
I'll use, more electricity.