CONTROLLED PRACTICE. I. Choose the correct option and answer the questions using the text of the article.

I. Choose the correct option and answer the questions using the text of the article.

1. What is the No. 1 polluter of clean water?

A agriculture

B textile industry

C oil industry

D car industry

2. What does being prone to something mean?

A addicted to something

B harmful for something

C likely to suffer from something

D dependent on something

3. Find the synonym to the word “tackle”

A eliminate

B solve

C distribute

D delegate

4. Why adsorption with activated carbons did not prove to be effective for industrial use?

A Activated carbon is a single-use substance and difficult to dispose of

B Activated carbon is expensive

C Cleaning the water with activated carbon requires additional processes

D Activated carbon is a single-use substance, and its use for water treatment requires additional processes

5. What helped the scientists generate the nano-silica-silver composite material?

A fungi

B algae

C insects

D plants

6. What are the advantages of water purification with nano-silica-silver composite material?

II. Decide whether the following statements are true or false and prove your answer by citing the article.

1. Conventional methods of water purification are highly efficient.

2. The best technologies for removing dye are coagulation, flocculation and reverse osmosis.

3. Water purification with nano-silica-silver composite is cheap and leads to sustainable results.

4. The new nanocomposite removes dye efficiently but does not have an antimicrobial effect.

5. The new nanocomposite can be used multiple times.

III. Work in pairs. Divide the article into two parts. Each of you will make a summary of one part. Then retell the article to each other.

IV. You are a representative of a company that produces nano-water-filters. Make an advertisement of your product. Present it in class.

Lesson IX

WORD-STUDY

Exercise 1. Check the transcription in a dictionary, read and translate the words listed below.

Nouns

Propulsion, microcarriers, feedback, actuation

Verbs

Automate, employ, resemble, penetrate

Adjectives

Stimuli-responsive, self-folding, therapeutic, gradient

Exercise 2. Match Russian and English equivalents.