Choose the word which is opposite in meaning to the underlined word in the following sentence.

These toxic chemicals will contaminate the groundwater and make it unsafe for drinking.

Choose the phrase which is closest in meaning to the underlined phrase in the following sentence.

My mom always helps me to keep those plants alive. She definitely has green fingers.

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If we banned plastic, what ______?

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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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Bring a raincoat with you ______ it rains.

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The coastal waters here have a complex ______ which includes thousands of plant and animal species.

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If tourists ______ rubbish in the river, the water would be cleaner.

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Individually wrapped candy or chocolate causes a lot of trash, ______ fruits and vegetables are healthier and mean less waste.