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.

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

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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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If wastes are thrown ______, they can cause pollution in water, land and air.

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Ann: I think we should ban single-use plastic.

Bill: ______. Plastic makes life more convenient.

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The effects of ______ are the environmental and social changes caused (directly or indirectly) by human emissions of greenhouse gases.

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Fish and poultry have a much lower impact ______ the environment, and other plant proteins are even less damaging ______ the planet.

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