Fossil fuels are and will be still ______ for at least the next two-three decades at relatively low costs.

单选题

Fossil fuels are and will be still ______ for at least the next two-three decades at relatively low costs.

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单选题

All car makers are spending billions trying to figure out a future that is more______，more autonomous and steps back from fossil fuels。

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单选题

All the materials used to seal the tanks are fully resistant to all the fuels and the fuel additives.

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材料题

al reserves become more difficult to access,oth-ers such as oil shales and tar sands may be used instead. Petrol could also be obtained from coal.Since we started using fossil fuels,we have released 400 billion tonnes of carbon,and burning the entire reserves could eventually raise world temperatures by 13℃ .Among other horrors,this would result in the destruction of all rainforests and the melting of allArctic ice.What is NOT the result of consuming fossil fuels according to the last paragraph?

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单选题

re garbage is produced each year．However,garbage can be a good fuel to use．The things in garbage do not look like coal,petroleum,or natural gas;but they are chemically similar to these fossil fuels．As we use up our fossil-fuel supplies,we might be able to use garbage as an energy source．Burning garbage is not a new idea．Some cities in Europe and the United States have been burning garbage for years．The heat that is produced by burning garbage is used to boil water．The steam that is produced is u

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