Choose the best word or phrases to complete the following sentences

If you want to raise rents, you have to                the housing first.

Choose the best answer to complete each sentence.

We will need new technologies to generate energy and use it in clean and safe ways, only from fully ______ sources.

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New York has invested substantially in improving the ______ of its waterways in recent years.

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China has already been experimenting with ways to make its cities more ______ for the last two decades.

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Copenhagen has been voted the most ______ city in the world several times.

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Vancouver is often considered to be one of the most ______ cities in the world. 

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By 2050, seven out of every 10 people on Earth will be a(n) ______ .

Find out the ANTONYM of the underlined word from the options below

The high-speed train link is responsible for one of the biggest urban regeneration projects in the area.