The proper reaction to the discovery of a fossil is:
The proper reaction to the discovery of a fossil is:
People are beginning to use clean energy sources mainly because _______. A: fossil fuels have caused a lot of pollution B: clean energy is cheap C: fossil fuels have cost a lot of lives D: they do not have enough fossil fuels now
People are beginning to use clean energy sources mainly because _______. A: fossil fuels have caused a lot of pollution B: clean energy is cheap C: fossil fuels have cost a lot of lives D: they do not have enough fossil fuels now
The burning of fossil fuels results in the pollution of the______.
The burning of fossil fuels results in the pollution of the______.
It is predicated that existing reserves of fossil fuel ____________ by 2045.
It is predicated that existing reserves of fossil fuel ____________ by 2045.
What two effects does burning fossil fuel have?
What two effects does burning fossil fuel have?
什么叫化石（fossil）？研究化石的意义是什么？
什么叫化石（fossil）？研究化石的意义是什么？
The reconstruction of _____ species from fossil bones was often undertaken by museum workers.
The reconstruction of _____ species from fossil bones was often undertaken by museum workers.
Fossil fuels like coal, oil and natural gas are non-renewable energy sources.
Fossil fuels like coal, oil and natural gas are non-renewable energy sources.
There is a large amount of fossil fuel on earth, but the sun supplied a(n) (limit) __________ supply of energy.
There is a large amount of fossil fuel on earth, but the sun supplied a(n) (limit) __________ supply of energy.
U3T204. Almost 90 percent of the world's energy is supplied through the ______ of fossil fuels,
U3T204. Almost 90 percent of the world's energy is supplied through the ______ of fossil fuels,