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ecosystems


communities of animals and plants interacting with their environment

In coral reef ecosystems, plants serve as a source of oxygen for fish.

ecosystems

disposable


made to be thrown away after use

Each year, Americans toss millions of disposable plastic bags into the trash.

disposable

controversial


causing much discussion and disagreement

The city’s controversial decision to close schools led to many protests.

controversial

contaminate


to make unfit for use by adding something harmful

Cars, trucks, and factories can all contaminate the air we breathe.

contaminate

purified


made clean or pure; freed of harmful substances

The Red Cross provides purified water to areas affected by natural disasters.

purified
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