Pollution
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Water pollution is the d________e in the quality of water. 水質汚染は水質のd________eです。
decrease
Which type of pollution causes infections? (water or air pollution) どのタイプの汚染が感染を引き起こしますか? (水または大気汚染)
water pollution
Why is it important to do things to reduce pollution?
To help save our planet
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