Which factors create harmful gases

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Choose the letter A, B, C or D to answer these following questions

People need to breathe. If they don’t breathe, they will die. But how clean is the air people breathe? If they breathe dirty air, they will have breathing problems. Plants and animals need fresh air too. A lot of the things in our lives create harmful gases and make the air dirty, like cars, motorbikes, and factories. Dirty air is called polluted air. Air pollution can also make our Earth warmer.

Question: Which factors create harmful gases?

Many things like water and air.

Vehicles and factories.

Plants and animals.

The sun and the moon.

Giải thích

Đáp án: B

Giải thích: Dựa vào câu: “A lot of the things in our lives create harmful gases and make the air dirty, like cars, motorbikes, and factories”.

Dịch: Rất nhiều thứ trong cuộc sống của chúng ta tạo ra khí độc hại và làm cho không khí bẩn, như ô tô, xe máy và nhà máy.