Conclusion

So, no single solution can meet our society's future energy needs. The solution instead will come from the family of diverse energy technologies that do not deplete our natural resources or destroy our environment. That’s the final decision that the nature imposes. Today mankind’s survival directly depends upon how quickly we can renew the polluting fuel an energy complex we have now with sound and environmentally friendly technologies.

Certainly, alternative sources of energy have their own drawbacks, just like everything in the world, but, in fact, they seem minor in comparison with the hazards posed by conventional sources. Moreover, if talking about the dangers posed by new energy technologies, there is a trend of localization. Really, these have almost no negative global effect, such as air pollution.

Moreover, even the minor effects posed by geothermal plants or solar cells can be overseen and prevented if the appropriate measures are taken. So, when using alternatives, we operate a universal tool that can be tuned to suit every purpose. They reduce the terrible impact the human being has had on the environment for the years of his existense, thus drawing nature and technology closer than ever before for the last 2 centuries.

Final check

1. Choose the correct variant:

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1. Hydroelectric power is

   1.   ?    non-renewable

   2.   ?    renewable

2. Biomass and biofuels are

   1.   ?    renewable

   2.   ?    non-renewable

3. Tidal power is

   1.   ?    non-renewable

   2.   ?    renewable

4. Wave power is

   1.   ?    non-renewable

   2.   ?    renewable

5. Nuclear power is

   1.   ?    non-renewable

   2.   ?    renewable

6. Geothermal power is

   1.   ?    renewable

   2.   ?    non-renewable

7. Solar power is

   1.   ?    renewable

   2.   ?    non-renewable

8. Wind power is

   1.   ?    renewable

   2.   ?    non-renewable

9. Fossil fuels are

   1.   ?    non-renewable

   2.   ?    renewable

2. Find the matching part of the sentence

I.

Powered by movements of water in an estuary

Coal, oil and natural gas are called...

The chemical name for natural gas

Powered by hot rocks underground

Convert the Sun's energy directly into electricity

Energy from waste plant or animal material

Uranium is the fuel

Where the Earth gets most of its energy from

Formed from ancient dead plants

Powered by natural air movements

Formed from ancient dead animals

II.

Oil

Nuclear power

Tidal power

Methane

Coal

Fossil fuels

Wind power

Biomass

Geothermal power

Photovoltaic cells

Sun

3. Choose the correct variant:

1. Wind power

   1.   ?    does not depend on the Sun at all

   2.   ?    depends indirectly on the Sun

   3.   ?    depends directly on the Sun

2. Hydroelectric power

   1.   ?    depends indirectly on the Sun

   2.   ?    does not depend on the Sun at all

   3.   ?    depends directly on the Sun

3. Wave power

   1.   ?    depends directly on the Sun

   2.   ?    does not depend on the Sun at all

   3.   ?    depends indirectly on the Sun

4. Geothermal power

   1.   ?    depends directly on the Sun

   2.   ?    depends indirectly on the Sun

   3.   ?    does not depend on the Sun at all

5. Solar power

   1.   ?    depends indirectly on the Sun

   2.   ?    depends directly on the Sun

   3.   ?    does not depend on the Sun at all

6. Nuclear power

   1.   ?    depends indirectly on the Sun

   2.   ?    does not depend on the Sun at all

   3.   ?    depends directly on the Sun

7. Fossil fuels

   1.   ?    do not depend on the Sun at all

   2.   ?    depend directly on the Sun

   3.   ?    depend indirectly on the Sun

8. Biomass

   1.   ?    depends directly on the Sun

   2.   ?    depends indirectly on the Sun

   3.   ?    does not depend on the Sun at all

 OK 

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