Give the examples from the text about the using biochemical sources of energy

Confirm with the facts from the text that the problem of remaking the polychlorviyl film wastes can be solved with the help of microorganisms.

Explain, what way the artificial atmosphere may be created.

Lesson 84

13. State whether the word in bold type is a gerund or a participle and translate the following sentences into Ukrainian:

1. Using a beam of electrons in place of the usual beam of light solved the problem of studying microorganisms. 2. Using a beam of electrons in place of the usual beam of light scientists built a microscope with great magnifying power. 3. Studying the properties of electrons atomic physicists solved the problem of constructing a very powerful microscope. 4. Studying the properties of electrons gave the possibility of constructing a very powerful microscope. 5. Constructing an electron microscope become possible after numerous experiments of atomic physicists. 6. Constructing an electron microscope scientists succeded in bringing to view the fine structure of materials.