Write the questions using the prompts. Match them to the answers a-h

1) Where / all energy / come / from?

2) What / the result /photosynthesis?

3) What /the first country / to develop /a photoelectric battery?

4) How / solar energy / used?

5) Why /the efficiency of solar power stations/ reduced?

6) What /the solar chemical reactor / use?

7) What / power stations / in Kamchatka?

8) What / the purpose of developing new sources of energy?

a) In two ways: thermal and photovoltaic.

b) Russia

c) Solving the energy problem.

d) Because of limited time of its work.

e) The energy stored in coal, oil, and natural gas.

f) From the Sun.

g) Geothermal power stations operating on hot water-steam mixture.

h) CO2 and water steam of the thermal power station.

4.2.13 Choose the correct alternative. (Infinitive/gerund)

1) We need to improve /improving the efficiency of solar power stations.

2) The scientists suggested to develop/ developing different combinations of solar power stations and traditional ones.

3) They plan to work / working with energy of the solar heat.

4) It is worth pointing out / to point out why large hydroelectric stations are not good for use.

5) The World Energy Council refused to use / using traditional biomass because of environmental problems it can cause.

6) We expect to solve /solving the energy problem in the nearest future.