31.   Greenhouse gases come mostly from burning fossil fuels, like coal and oil, and one of the best ways to reduce their emission is to save energy.

32.   He must have been saving his energy for the party, to which he came fashionably late but stayed until the wee hours.

33.   His tasks are fairly easy, so he saves energy for his personal ambitions.

34.   Homeowners hit in the wallet have been instantly and personally reminded of the importance of saving energy.

35.   Imagine how much energy we could save if the waste heat produced by the countless machines we use could be converted into electricity.

36.   In our series on ways to save energy in the kitchen, here are more tips and another recipe that goes easy on the kilowatts.

37.   Ironically, the reason for establishing the lower limit was to save energy.

38.   It was a crowd that saved its energy for shopping.

39.   Kim also talked about boosting exports and saving energy to reduce fuel imports.

40.   Miller should have saved his energy.