It is predicated that existing reserves of fossil fuel ____________ by 2045.

Brazil is the world’s second largest producer of ______. A: biofuel B: fossil fuel C: corn fuel D: ethanol fuel

What two effects does burning fossil fuel have?

There is a large amount of fossil fuel on earth, but the sun supplied a(n) (limit) __________ supply of energy.

Fossil fuel contains ① coal; ② Petroleum; ③ Natural gas; ④ Combustible ice. A: ①, ②； B: ②, ④； C: ①, ②, ③, ④. D: --

中国大学MOOC: Fossil fuel contains ① coal; ② Petroleum; ③ Natural gas; ④ Combustible ice.

Electricity generated from hydroelectric dams and wind power is more _______ than fossil fuel generated power.

Which of the following is not clean energy A: solar powe B: wind powe C: electronic powe D: fossil fuel

中国大学MOOC: The energy that the sun radiates to earth every is equivalent to the sum of all the fossil fuel energy of the energy.

The energy that the sun radiates to earth every is equivalent to the sum of all the fossil fuel energy of the energy A: one day B: three days C: one months D: --