3. Look through text iva and answer the questions.

1. What will play an important part in the renewable energy equa­tion of the 21^st century? 2. When and where was the first geother­mal-generated electricity produced? 3. Where is geothermal energy derived from? 4. What provides the physical force for the turbine blades to generate electricity? 5. How do dry steam reservoirs pro­duce steam? 6. Where is heat transferred into the second liquid? 7. What technique utilizes heat pump? Describe it.

4. Complete the sentences.

1. Experts believe that the ultimate source of geothermal energy is ... .2. Steam is piped to where it can .... 3. Engineers have deve­loped several methods for ... .4. When geothermal-heated water is

hot enough to flat into steam, it can still .... 5. The vapor is then .... 6. The geothermal heat pump is one of... . 7. And also no combus­tion occurs, some systems ... . 8. Geothermal energy alone won't solve the energy problem, but it... .

5. Translate the sentences paying attention to the Absolute Participial Construction.

1. Burning fossil fuels creates carbon dioxide, with the greenhouse contributing to global warming. 2. A heat transfer fluid heated in the receiver is used to generate steam, the latter in its turn being used in a conventional turbine-generator to produce electricity. 3. A thermal receiver can be a bank of tubes, with a cooling fluid, usually hydrogen or helium, being applied as the heat transfer medium and also the working fluid for an engine. 4. When absorbed, the concen­trated beam of solar energy is converted into heat, the latter being transferred to the engine. 5. Micro turbines being currently manufac­tured for distributed generation systems, they could potentially be used in dish-engine systems. 6. When evaluating a design, the new approach allows many computations to be performed quickly. 7. The renewable energy sources create their own energy, with the object being to capture and harness their mechanical power and convert it into electricity.

6. Translate the sentences paying attention to the meaning of the verb "to do".

1. Dry steam reservoirs do produce steam but little water. 2. Fossil fuels do exist and they provide a valuable service. 3. The impact of global warming on the environment is extensive and does affect many areas. 4. The renewable energy sources do create their own energy. 5. The nuclei do contain most of the mass of the atom. 6. The simple voltaic cell certainly does act as a generator of electric current. 7. It has been shown that chemical combination as well as external pressure does influence although slightly the activity of ra­dioactive nuclei. 8. Since the Moon and the Earth are at the same distance from the Sun, they do receive radiation at the same rate.

7. Speak about the advantages of geothermal power.

8. Read text ivb and answer the question: why is biomass avail­able solution to the global energy problems?

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