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a pollutions standard is a kind of standard for reducing pollutants emitted by vehicles & many vehicles emit pollution into the air | a pollution standard can help reduce pollutants emitted by vehicles |
a pollution standard can help reduce pollutants emitted by vehicles & a vehicle inspection is when a person examines a vehicle for pollution standards | the insepction of vehicles to meet pollution standards can help reduce pollutants emitted by vehicles |
as the use of public transportation increases , the use of automobiles decreases & bus is a kind of public transportation | as the use of buses increases, the use of automobiles decreases |
as the use of buses increases, the use of automobiles decreases & the use of automobiles causes pollution to the environment | as the use of buses increases, the pollution caused by using automobiles will decrease |
coal is a kind of fossil fuel & oil is a kind of fossil fuel & burning fossil fuels releases sulfur dioxide into the atmosphere | burning coal and oil releases sulfur dioxide into the atmosphere |
burning coal and oil releases sulfur dioxide into the atmosphere & sulfur dioxide is a kind of gas & sulfur dioxide dissolving in water causes acid rain | gases from burning coal and oil dissolving in water in the atmosphere causes acid rain |
gas-efficient engines uses less gasoline & using gasoline requires burning gasoline | gas-efficient engines will burn less gasoline |
gas-efficient engines will burn less gasoline & burning gasoline is a source of air pollution | gas-efficient engines will cause less air pollution |
gas-efficient engines will cause less air pollution & an engine is a part of an automobile | using a gas-efficient engine in automobiles will cause less air pollution |
emitting sulfur dioxide causes acid rain & sulfur scrubbers can reduce the emission of sulfur dioxide | sulfur scrubbers can reduce the cause of acid rain |
humans discarding waste in an environment causes harm to that environment & discarding is similar to throwing & garbage means waste | humans throwing garbage in an environment causes harm to that environment |
a body of water is a kind of environment & a stream is a kind of moving body of water | a stream is a kind of environment |
humans throwing garbage in an environment causes harm to that environment & a stream is a kind of environment | humans throwing garbage into a stream causes harm to the stream |
a frog is a kind of aquatic animal & a mountain chorus frog is a kind of frog | a mountain chorus frog is a kind of aquatic animal |
a mountain chorus frog is a kind of aquatic animal & bodies of water are the habitats for aquatic animals | bodies of water are the habitats for mountain chorus frogs |
bodies of water are the habitats for mountain chorus frogs & a mountain chorus frog is a kind of animal & pollutions in animals habitat can cause the population of animals to decrease | water pollution in bodies of water can cause the population of mountain chorus frogs to decrease |
water pollution in bodies of water can cause the population of mountain chorus frogs to decrease & polluting means something poisonous is added to an environment & a body of water is a kind of environment | poisonous things added in water can cause the population of mountain chorus frogs to decrease |
oil is a kind of pollutant & water pollution is when humans pollute the environment with pollutants | an example of water pollution is when humans pollute the environment with oil |
an example of water pollution is when humans pollute the environment with oil & offshore oil platforms might cause oil to leak into the water & water is a part of an environment | offshore oil platforms might cause water pollution by leaking oil into the water |
a lawn is a piece of land covered with grass & lori uses fertilizer on her lawn & if fertilizer is used on a land, then the runoff from that land will contain fertilizer | the runoff from the lawn will contain fertilizer |
the runoff from the lawn will contain fertilizer & a lake is a kind of body of water & runoff flows across land and ends in bodies of water | the runoff from the lawn containing fertilizer can flow and end in the lake |
a lake is a kind of body of water & algae is found in bodies of water | algae can be found in lake |
the runoff from the lawn containing fertilizer can flow and end in the lake & algae can be found in lake & fertilizers have a positive impact on algae growth | the population of algae in the lake will increase because of the fertilizer in the runoff |
phytoplankton is a kind of plant & phytoplanktons are found in bodies of water & an ocean is a kind of body of water | phytoplanktons are plants that can be found in the ocean |
algae is found in bodies of water & algae is a kind of plant & an ocean is a kind of body of water | algae is a plant that can be found in the ocean |
phytoplanktons are plants that can be found in the ocean & algae is a plant that can be found in the ocean | phytoplanktons and algae are plants that can be found in the ocean |
phytoplanktons and algae are plants that can be found in the ocean & plants are a source of oxygen through photosynthesis | phytoplanktons and algae are source of oxygen in the ocean |
phytoplanktons and algae are source of oxygen in the ocean & ocean pollution can decrease the number of phytoplanktons and algae | ocean pollution can decrease the source of oxygen in the ocean |
ocean pollution can decrease the source of oxygen in the ocean & as the amount of a source of something decreases , the amount of that something will decrease | ocean pollution can cause the amount of oxygen to decrease in the ocean |
tuna eat fish & if an animal eats other animals for food , then the animal is the predator | tuna is a kind of predator |
tuna is a kind of predator & tuna is a kind of fish | tuna is a kind of predatory fish |
tuna is a kind of predatory fish & commercial harvesting from the ocean has caused populations of large predatory fish to decrease | commercial harvesting from the ocean has caused the populations of tuna to decrease |
a rhinoceros is a kind of animal & overhunting decreases animal populations | overhunting can decrease rhinoceros populations |
overhunting can decrease rhinoceros populations & decreasing in population will cause the population to be low & endangered means low in population | overhunting can cause the rhinoceros to be endangered |
killing a living thing decreases the population of that living thing & hunting is when a human kills an animal for food / recreation in the wild & an animal is a kind of living thing | hunting / overhunting decreases animal populations |
hunting / overhunting decreases animal populations & an animal is a kind of organism & if a population decreases to zero then that organism is extinct | if hunting decreases the animal population to zero, then that animal is extinct |
an organism becoming extinct causes a change in the organism 's food web & a change in a food web can cause damage to an ecosystem | extinctions of organisms can cause damage to an ecosystem by changing the food web |
aluminum is recyclable & recyclable means a material can be recycled / reused many times | aluminum can be recycled |
aluminum can be recycled & recycling decreases the amount of waste sent to landfills | recycling aluminum can decrease the amount of waste sent to landfills |
aluminum cans are made of aluminum & aluminum is recyclable | aluminum cans are recyclable |
aluminum cans are recyclable & recyclable means a material can be recycled / reused many times | aluminum cans can be recyled many times |
aluminum cans can be recyled many times & an aluminum can is a kind of object & an example of recycling is using an object to make a new object | using aluminum cans to make a new object is an example of recycling |
aluminum is recyclable & an aluminum can is made of aluminum | an aluminum can is recyclable |
metal is a kind of natural resource & aluminum is a kind of metal | aluminum is a kind of natural resource |
aluminum is a kind of natural resource & aluminum cans are made of aluminum | aluminum cans are made of a natural resource |
aluminum cans are made of a natural resource & recycling resources has a positive impact on the conservation of those resources | recycling aluminum cans has a positive impact on the conservation of those resources |
trash is similar to waste & recycling decreases the amount of waste sent to landfills | recycling decreases the amount of trash sent to landfills |
aluminum is a kind of material & aluminum is recyclable | aluminum is a kind of material that is recyclable |
aluminum is a kind of material that is recyclable & recyclable means a material can be recycled many times | aluminum can be recycled many times |
aluminum can be recycled many times & aluminum is a nonrenewable resource | aluminum is a nonrenewable resource that can be recycled many times |
aluminum is a nonrenewable resource that can be recycled many times & recycling nonrenewable resources has a positive impact on the environment | recycling aluminum has a positive impact on the environment |
recycling aluminum has a positive impact on the environment & recycling is a kind of method of disposal | recycling aluminum is the best way to dispose aluminum |
cardboard is inexpensive in cost & cardboard is recyclable & cardboard is a kind of material & cardboard is biodegradable | cardboard is a material that is recyclable, biodegradable, and inexpensive in cost |
the inner core is located in the center of the earth & the pressure at the center of the earth is extremely high | the inner core of the earth is under extremely high pressure |
the inner core of the earth is under extremely high pressure & extreme high pressure causes the inner core of earth to be in solid state | the inner core of earth is solid |
the oceanic crust mainly is made of basalt & the continental crust mainly is made of granite & basalt is more dense than granite | the oceanic crust is more dense than the continental crust |
the mantle is the largest layer of the earth & the mantle is located between the crust and the outer core | the mantle is the largest layer of the earth located between the crust and the outer core |
earthquakes causes older rock to be on top of younger rock & earthquakes cause rock layers to fold on top of each other | earthquakes causes older rock layers to be on top of younger rock layers by folding the rock layers |
the mantle of the earth is mainly made of silicate & the crust of the earth is made of basalt or granite | the mantle of the earth is mainly made of silicate and the crust of the earth is made of basalt or ganite |
basalt is a kind of material & granite is a kind of material & silicate is a kind of material | silicate, basalt, and granite are kinds of materials |
the mantle of the earth is mainly made of silicate and the crust of the earth is made of basalt or ganite & silicate, basalt, and granite are kinds of materials & different media are made of different materials | the mantle and the crust are different media |
the mantle and the crust are different media & waves travel at different speed in different medium | waves will travel at different speed in the mantle and the crust |
waves will travel at different speed in the mantle and the crust & an earthquake wave is a kind of wave | earthquake waves will travel at different speed in the mantle and the crust |
active volcanoes are most common along tectonic plate boundaries & earthquakes are most common along tectonic plate boundaries | active volcanoes and earthquakes are most common along tectonic plate boundaries |
california is located on the boundary of two tectonic plates & earthquakes are most common along tectonic plate boundaries & massachusetts is not located on the boundary of two tectonic plates | earthquakes are more likely to occur in california than in massachusetts |
all waves transmit energy from one place to another & an earthquake wave is a kind of wave | earthquake waves transmit energy from one place to another |
mountains are formed by plate tectonics & the appalachian mountains are a kind of mountain | the appalachian mountains are formed by plate tectonics |
the collision of tectonic plates are found at the convergent boundaries & the collision of the boundaries causes rocks to fold | the collision of the tectonic plates causes rocks to fold at the convergent boundaries |
the collision of the tectonic plates causes rocks to fold at the convergent boundaries & a mountain range is formed by rocks folding upon one another | mountains will form at the convergent boundaries by the collision of the tectonic plates |
mountains will form at the convergent boundaries by the collision of the tectonic plates & the appalachian mountains are a kind of mountain | the appalanchian mountains are formed at the convergent boundaries by the collision of the tectonice plates |
a volcanic eruption is a kind of quick process & new land can be formed by volcanoes erupting by lava cooling | volcano eruption can quickly form a new land when lava cools down |
the subduction of tectonic plates may cause magma to surface from underneath & the oceanic plate is a kind of tectonic plate | the subduction of an oceanic plate may cause magma to surface from underneath |
the subduction of an oceanic plate may cause magma to surface from underneath & magma cools down when it comes to the surface from underneath | the subduction of an oceanic plate will cause magma to surface and cool down |
the subduction of an oceanic plate will cause magma to surface and cool down & magma cooling can form volcanic mountains | the subduction of an oceanic plate can form volcanic mountians |
volcanic ash in the atmosphere decreases the temperature by blocking the sun & emitting sulfur dioxide causes acid rain & an erupting volcano releases sulfur gas and ash into the atmosphere | a volcanic eruption can cause acid rain and decrease the temperature |
a volcanic eruption can cause acid rain and decrease the temperature & europe was unusally cold and had acid rain in 1783 | a volcanic eruption may have happened to cause the cold weather and acid rain in europe |
the amount of sunlight usually is the same at the locations with same latitude & the intensity of sunlight is a kind of seasonal weather pattern | locations with same latitude has the same seasonal weather pattern of sunlight intensity |
nitrogen is a kind of gas & most means over 50% of something & the earth 's atmosphere is made of 78 percent nitrogen by mass | nitrogen gas makes up most of the earth's atmosphere |
the earth 's atmosphere is made of 21 percent oxygen by volume & the earth 's atmosphere is made of 78 percent nitrogen by volume | nitrogen and oxygen make up 99% of the earth's atmosphere by volume |
nitrogen and oxygen make up 99% of the earth's atmosphere by volume & most means over 50% of something | nitrogen and oxygen make up most of the earth's atmosphere |
the earth 's atmosphere is made of 78 percent nitrogen by volume & the earth's atmosphere is made of 04% to 1% of water vapor by volume & the earth 's atmosphere is made of 21 percent oxygen by volume & the earth 's atmosphere is made of 036 percent carbon dioxide by volume | earth's atmosphere is made of nitrogen, oxygen, water vapor, and carbon dioxide |
as altitude increases , the temperature of the air will decrease in the troposphere & an increase is the opposite of a decrease & as the altitude increases , the temperature of the air will increase in the stratosphere | as the altitude increases, the change of air temperature are opposite in stratosphere and troposphere |
the earth 's atmosphere is made of 04 to 1 percent water vapor by volume & water vapor is a kind of greenhouse gas | water vapor is a greenhouse gas accounting for 04 to 1 percent of the earth's atmosphere |
carbon dioxide is a kind of greenhouse gas & the earth 's atmosphere is made of 036 percent carbon dioxide by volume | carbon dioxide is a greehouse gas accounting for 0036 percent of the earth's atmosphere |
water vapor is a greenhouse gas accounting for 04 to 1 percent of the earth's atmosphere & carbon dioxide is a greehouse gas accounting for 0036 percent of the earth's atmosphere & 04 is bigger than 0036 | water vapor is the largest amount of greenhouse gas in the atmosphere |
the earth 's atmosphere is made of 78 percent nitrogen by mass & most means over 50% of something | the earth's atmosphere is mostly made of nitrogen |
aurora is a kind of atmospheric phenomena & an aurora is created by charged particles interact with magnetosphere | an aurora is an atmospheric phenomena that is created by charged particles interacting with magnetosphere |
photosynthesis is a source of oxygen & a source of something increases the amount of that something | photosynthesis increases the amount of oxygen in the atmosphere |
photosynthesis increases the amount of oxygen in the atmosphere & the photosynthetic life performs photosynthesis | photosynthetic life increases the amount of oxygen in the atmosphere |
early photosynthetic life is a kind of photosynthetic life & early photosynthetic life existed a long time ago | early photosynthetic life is a kind of photosynthetic life that existed a long time ago |
photosynthetic life increases the amount of oxygen in the atmosphere & early photosynthetic life is a kind of photosynthetic life that existed a long time ago | early photosynthetic life increased the amount of oxygen in the atmosphere a long time ago |
early photosynthetic life increased the amount of oxygen in the atmosphere a long time ago & earth had no / little oxygen a very long time ago & oxygen level describes an amount of oxygen | early photosynthetic life increased the oxygen level in earth 's atmosphere |
oceans cover 70% of the surface of the earth & most means over 50% of something | oceans cover most of earth's surface |
oceans cover most of earth's surface & an ocean is a kind of body of water | water covers most of earth's surface |
majority means over 50% of something & earth contains glaciers / ice caps & ice caps and glaciers contain 69% of the freshwater on earth | the majority of freshwater is found in ice caps and glaciers on earth |
most means over 50% of something & ice caps and glaciers contain 69% of freshwater on earth | ice caps and glaciers contain most of the freshwater on earth |
ice caps and glaciers contain most of the freshwater on earth & glaciers are a kind of major reservoir | glaciers are a major reservoir that contains most of the freshwater on earth |
glaciers are a major reservoir that contains most of the freshwater on earth & ice sheet is a kind of glacier | ice sheets are a major reservoir that contains most of the freshwater on earth |
deflection is when an object changes its moving direction & the drag of wind causes the surface of the water to change its direction toward the direction of the wind | the drag of wind causes the water to deflect toward the direction of the wind |
oceans contain most of earth 's water & water is made of hydrogen and oxygen | ocean water is made of hydrogen and oxygen |