Find out the synonym of the underlined word from the options below.

The area is roped off because the water is seriously polluted.         

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Burning garbage ________dangerous gases to the environment, and this may lead to global warming.

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The campaign ________things like water bottles and aluminum cans into new, useful objects like park benches, bikes, etc.

Choose the best answer to complete each sentence.

Recycling provides a method of reducing the amount of waste materials that gets to the landfills – thus ______ it less probable for environmental pollution to take place.

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Forest biodiversity is threatened by illegal                  carried out globally. 

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Trees not only bring nature to urban areas, but they also help clean the air by absorbing pollutants, ______oxygen, ______water, and growing food.

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We get the energy we require for our everyday needs from many sources, but not all of them are ___________.

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Fossil fuels which are non-renewable pollute the air and cause air _______.