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coal is used for generating heat by burning & to generate something means to produce something | coal is used for producing heat by burning |
burning wood is used to produce heat & a tree contains wood | burning trees is used to produce heat |
coal is used for producing heat by burning & burning trees is used to produce heat | coal and trees are both used for producing heat |
burning fossil fuels is a source of air pollution & coal is a kind of fossil fuel | burning coal is a source of air pollution |
coal is used for generating heat by burning & coal is used to produce electricity by burning in coal-fire power stations | using coal usually requires burning coal |
burning coal is a source of air pollution & using coal usually requires burning coal | using coal causes air polluiton |
burning converts chemical energy into thermal energy & coal is used for generating heat by burning | burning coal converts chemical energy to thermal energy |
renewable is the opposite of nonrenewable & something cannot have two opposite properties | something cannot be renewable and nonrenewable |
something cannot be renewable and nonrenewable & fossil fuels are a nonrenewable resource | fossil fuels cannot be renewable |
renewable is a property of resources & if something cannot have a certain property then something else with that property is not that something | if one resource cannot be renewable then another resource that is renweable is not that one resource |
fossil fuels cannot be renewable & if one resource cannot be renewable then another resource that is renweable is not that one resource | if something is renewable then that something is not a fossil fuel |
if something is renewable then that something is not a fossil fuel & wood is a renewable resource | wood is not a fossil fuel |
fossil fuels are a nonrenewable resource & nonrenewable resources will eventually be depleted | fossil fuels will eventually be depleted |
remains are parts of a dead organism & fossil fuels / fossils are formed from dead organisms over time | fossil fuels are formed from the remains of organisms |
fossil fuels are formed from the remains of organisms & an organism is a living thing | fossil fuels are formed from the remains of living things |
how long something lasts is a measure of how long that something is available & as the use of a resource decreases , the length of time that resource being available will increases | as the use of a resource decreases, the length of time that that resource will last increases |
as the use of a resource decreases, the length of time that that resource will last increases & to last longer means the length of time that something lasts increases | decreasing the use of a resource causes that resource to last longer |
oil is used for producing electricity0 & fossil fuels are a kind of energy resource | a fossil fuel supply is a kind of resource |
decreasing the use of a resource causes that resource to last longer & a fossil fuel supply is a kind of resource | decreasing the use of a fossil fuel supply causes that fossil fuel supply to last longer |
oil is used for producing electricity & oil is a kind of fossil fuel | fossil fuel is used for producing electricity |
fossil fuel is used for producing electricity & as the use of something decreases, the use of things used to produce that something decreases | as the use of electricity decreases, the use of fossil fuels decreases |
oil is used for producing electricity1 & as the use of something decreases , the use of the source of that something will decrease | as the use of something decreases, the use of the supply of that something decreases |
as the use of electricity decreases, the use of fossil fuels decreases & as the use of something decreases, the use of the supply of that something decreases | as the use of electricity decreases, the use of a fossil fuel supply decreases |
decreasing the use of a fossil fuel supply causes that fossil fuel supply to last longer & as the use of electricity decreases, the use of a fossil fuel supply decreases | decreasing the use of electricity causes a fossil fuel supply to last longer |
decreasing the use of electricity causes a fossil fuel supply to last longer & to decrease something means to reduce something | reducing the use of electricity causes the fossil fuel supply to last longer |
burning something is a kind of action & if something occurs by performing an action, then that action is required for that something to occur | if something occurs by burning something else, then burning that something else is required for that something to occur |
if something occurs by burning something else, then burning that something else is required for that something to occur & natural gas is used for generating electricity by burning in a power plant | using natural gas to generate electricity requires burning that natural gas |
using natural gas to generate electricity requires burning that natural gas & fossil fuels are a nonrenewable resource1 | using fossil fuels to generate electricity requires burning fossil fuels |
using fossil fuels to generate electricity requires burning fossil fuels | using fossil fuels to generate power requires burning fossil fuels |
fossil fuels are a nonrenewable resource2 & electrical power is a kind of power | electricity is a kind of power |
using fossil fuels to generate power requires burning fossil fuels & electricity is a kind of power & fossil fuels are a nonrenewable resource0 | using fossil fuels to generate power produces greenhouse gasses |
using fossil fuels to generate power produces greenhouse gasses & fossil fuels are a nonrenewable resource | using nonrenewable resources to generate power produces greenhouse gasses |
using nonrenewable resources to generate power produces greenhouse gasses & if something causes an increase in something else then that something produces that something else | using nonrenewable resources to generate power increases greenhouse gasses |
using nonrenewable resources to generate power increases greenhouse gasses & if something increases something else then decreasing that something will decrease that something else | decreasing the use of nonrenewable resources to generate power will decrease greenhouse gasses |
decreasing the use of nonrenewable resources to generate power will decrease greenhouse gasses & as the use of renewable resources increases , use of nonrenewable resources will decrease | if something occurs by burning something else, then burning that something else is required for that something to occur0: increasing the use of renewable resources to generate power will decrease greenhouse gasses |
if something occurs by burning something else, then burning that something else is required for that something to occur0 & to decrease something means to reduce that something | using renewable resources to generate power reduces greenhouse gases |
to produce something means to form something & a source of something emits / produces / generates / provides that something | a source of something forms that something |
a source of something forms that something & sulfur dioxide is formed by the combustion of fossil fuels | the combustion of fossil fuels is a source of sulfur dioxide |
energy formed by magma heating earth's crust is emitted along fault lines & geothermal energy is formed by magma heating earth 's crust | geothermal energy is emitted along fault lines |
geothermal energy is emitted along fault lines & a source of something emits / produces / generates / provides that something | fault lines are a source of geothermal energy |
nevada contains many active fault lines & if something contains many of something else then that something else is common in that something | active fault lines are common in nevada |
fault lines are a source of geothermal energy & active fault lines are common in nevada | geothermal energy is common in nevada |
geothermal energy is common in nevada & geothermal energy is a renewable resource | geothermal energy is a common renewable resource in nevada |
if something is emitted at a location then that something can be found at that location & energy formed by magma heating earth's crust is emitted along fault lines | energy formed by magma heating earth's crust can be found along fault lines |
energy formed by magma heating earth's crust can be found along fault lines & geothermal energy is formed by magma heating earth 's crust | geothermal energy can be found along fault lines |
geothermal energy can be found along fault lines & nevada contains many active fault lines | geothermal energy can be found in nevada |
geothermal energy can be found in nevada & geothermal energy is a renewable resource | geothermal energy is a renewable resource that can be found in nevada |
metal is a nonrenewable resource & copper is a kind of metal | copper is a kind of nonrenewable resource |
an example of heating something is heating a building & a source of heat can be used to heat something | a source of heat can be used to heat a building |
a source of heat can be used to heat a building & natural gas is a source of heat by burning | natural gas is used for heating building by burning |
natural gas is used for heating building by burning & a home is a kind of building | natural gas is used for heating homes by burning |
fossil fuels are a nonrenewable resource & natural gas is a kind of fossil fuel | natural gas is a nonrenewable resource |
natural gas is used for heating homes by burning & natural gas is a nonrenewable resource | natural gas is a nonrenewable resource that is used for heating homes |
gasoline is a kind of fuel & fuel is a kind of resource | gasoline is a kind of resource |
gasoline is a kind of resource & as the use of a resource decreases , the length of time that resource being available will increases | as the use of gasoline decreases, the length of time that gasoline is available will increase |
as the use of gasoline decreases, the length of time that gasoline is available will increase & as mileage per gallon of gasoline increases , the amount of gasoline used will decrease | as mileage per gallon of gasoline increases, the length of time that gasoline is available will increase |
as mileage per gallon of gasoline increases, the length of time that gasoline is available will increase & oil is a source of gasoline | as mileage per gallon of oil increases, the amount of time that oil is available will increase |
as mileage per gallon of oil increases, the amount of time that oil is available will increase & to increase something can mean to extend somthing | as mileage per gallon of oil increases, the amount of time that oil is available will be extended |
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 |
fossil fuels / fossils forming occurs over a period of 300000000 years which is considered a very long time to a human & fossil fuels / fossils are formed from dead organisms over time | fossil fuels are formed from dead organisms over a very long period of time |
fossil fuels are formed from dead organisms over a very long period of time & if something formed from something else over a very long period of time then that something else existed a very long time ago | fossil fuels are formed from dead organisms from a very long time ago |
fossil fuels are formed from dead organisms from a very long time ago & prehistoric means a very long time ago | fossil fuels are formed from dead prehistoric organisms |
if a living thing dies then that living thing is dead & a living thing is an organism | if an organism dies then that organism is dead |
if an organism dies then that organism is dead & dead organisms decay | if an organism dies then that organism is dead and decays |
fossil fuels are formed from dead prehistoric organisms & if an organism dies then that organism is dead and decays | fossil fuels are formed from prehistoric organisms dying and decaying |
fossil fuels are formed from prehistoric organisms dying and decaying & an animal is a kind of organism | fossil fuels are formed from prehistoric animals dying and decaying |
fossil fuels are formed from prehistoric animals dying and decaying & oil is a kind of fossil fuel | oil is formed from prehistoric animals dying and decaying |
if something comes from something else then that something else is a source of that something & oil is a source of gasoline | gasoline comes from oil |
gasoline comes from oil & oil is a nonrenewable resource | gasoline comes from a nonrenewable resource |
gasoline comes from a nonrenewable resource & a nonrenewable resource is limited in supply | gasoline comes from a resource that is limited in supply |
for something to be replaced means for something else to be used instead of that something & if a resource is limited in supply then that resource needs to be replaced | if a resource is limited in supply then something else needs to be used instead of that resource |
gasoline comes from a resource that is limited in supply & if a resource is limited in supply then something else needs to be used instead of that resource & an automobile is a kind of vehicle0 | something else must be used instead of gasoline because gasoline comes from a limited resource |
an automobile is a kind of vehicle & vehicles usually require gasoline to operate | automobiles usually require gasoline to operate |
automobiles usually require gasoline to operate & alternative fuels are being used in some automobiles | alternative fuels are being used in some automobiles instead of gasoline |
something else must be used instead of gasoline because gasoline comes from a limited resource & alternative fuels are being used in some automobiles instead of gasoline | alternative fuels are being used instead of gasoline in automobiles because gasoline comes from a limited resource |
fossil fuels are a nonrenewable resource & fossil fuels / fossils forming occurs over a period of 300000000 years which is considered a very long time to a human | nonrenewable resources forming occurs over a period of 300000000 years which is considered a very long time to a human |
two million or more years means millions of years & 300000000 years equals three hundred million years | 300000000 years means millions of years |
nonrenewable resources forming occurs over a period of 300000000 years which is considered a very long time to a human & 300000000 years means millions of years | nonrenewable resources forming occurs over a period of millions of years |
years are a kind of unit for measuring time & how long something takes is a kind of measurement of time | how many years something takes is a kind of measurement of time |
how many years something takes is a kind of measurement of time & a period is a kind of measurement of time | how many years something takes is a kind of period |
nonrenewable resources forming occurs over a period of millions of years & how many years something takes is a kind of period | nonrenewable resources forming can take millions of years |
a source of something emits / produces / generates / provides that something & using biomass to produce energy is a source of pollution | using biomass to produce energy emits pollution |
using biomass to produce energy emits pollution & if something emits something else then that something increases the amount of that something else | using biomass to produce energy increases the amount of pollution |
using biomass to produce energy increases the amount of pollution & biomass is a renewable resource | biomass is a kind of renewable resource that increases pollution when used to produce energy |
a solar panel is a kind of object & if an object converts something into something else, then that object uses that something to produce that something else | if a solar panel converts something into something else, then that solar panel uses that something to produce that something else |
if a solar panel converts something into something else, then that solar panel uses that something to produce that something else & a solar panel converts sunlight / solar energy into electrical energy / electricity | a solar panel uses solar energy to produce electrical energy |
a solar panel uses solar energy to produce electrical energy & solar energy is a renewable / inexhaustible resource | a solar panel uses a renewable resource to produce electrical energy |
a solar panel uses a renewable resource to produce electrical energy & electrical energy is a kind of energy | a solar panel uses a renewable resource to produce energy |