sentences: as the use of alternative fuels increases , the use of gasoline will decrease & if a certain something decreases the use of a resource then that certain something uses less of that resource than a regular something ->  something that uses alternative fuels uses less gasoline than a regular something  electricity is a kind of alternative fuel & electricity is a kind of alternative fuel3 ->  an electrical device uses alternative fuel to operate  an electrical device uses alternative fuel to operate & an electric motor is a kind of electrical device ->  an electric motor uses alternative fuel to operate  something that uses alternative fuels uses less gasoline than a regular something & an electric motor uses alternative fuel to operate ->  a something that uses an electric motor uses less gasoline than a regular something  electricity is a kind of alternative fuel0 & an electric car is a kind of machine ->  an electric car is a kind of machine that contains an electric motor  electricity is a kind of alternative fuel1 & if a machine contains a part then that machine uses that part ->  if a machine contains an electrical device then that machine uses that electrical device  if a machine contains an electrical device then that machine uses that electrical device & an electric motor is a kind of electrical device ->  if a machine contains an electric motor then that machine uses that electric motor  an electric car is a kind of machine that contains an electric motor & if a machine contains an electric motor then that machine uses that electric motor ->  an electric car uses an electric motor  a something that uses an electric motor uses less gasoline than a regular something & an electric car uses an electric motor ->  electric car uses less gasoline than a regular car  electricity is a kind of alternative fuel2 & using a gasoline engine requires burning gasoline -> something that uses alternative fuels uses less gasoline than a regular something0: using gasoline is a source of pollution  something that uses alternative fuels uses less gasoline than a regular something0 & pollution has a negative impact on the environment / air quality / water quality / society -> something that uses alternative fuels uses less gasoline than a regular something1: using gasoline has a negative impact on the environment / air quality / water quality / society  something that uses alternative fuels uses less gasoline than a regular something1 & using less of something negative has a positive impact -> something that uses alternative fuels uses less gasoline than a regular something2: using less gasoline has a positive impact on the environment / air quality / water quality / society  something that uses alternative fuels uses less gasoline than a regular something2 & electric car uses less gasoline than a regular car -> an electric car has a positive impact on the environment / air quality / water quality / society by using less gasoline