premise: oil is used for producing electricity sent2: to last longer means the length of time that something lasts increases sent3: as the use of something decreases , the use of the source of that something will decrease sent4: how long something lasts is a measure of how long that something is available sent5: fossil fuels are a kind of energy resource sent6: oil is a kind of fossil fuel sent7: to decrease something means to reduce something sent8: as the use of a resource decreases , the length of time that resource being available will increases sent9: as the use of something decreases, the use of things used to produce that something decreases.
hypothesis: reducing the use of electricity causes the fossil fuel supply to last longer