People need to breathe . If they don'n breathe, they .....die. But how clean is the air people breathe?If they breathe .....air , they will have breathing problems .....Plants and animals .......clean air, too. A lot of the things .... our lives create harmful gases and.......the air dirty , like cars, motorbikes and factories.Dirty air is called ".....air:. Air pollution can also make our earth warmer . The problem of air pollution started with the burning of coal in...... and factories ...
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People need to breathe . If they don'n breathe, they .....die. But how clean is the air people breathe?If they breathe .....air , they will have breathing problems .....Plants and animals .......clean air, too. A lot of the things .... our lives create harmful gases and.......the air dirty , like cars, motorbikes and factories.Dirty air is called ".....air:. Air pollution can also make our earth warmer . The problem of air pollution started with the burning of coal in...... and factories BAN NAO TRA LOI DUOC MIK SE TICK CHO NHE
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....clean 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 . The problem of air pollution started with the burning of coal in...houses... and factories