Language Point 13

...and polluted water supplies. (Para. 4)

pollute: make (air, water, soil, etc.) dangerously impure or unfit for use 污染

The Atlantic Ocean is in danger of becoming polluted.

大西洋面临着被污染的危险。

There is much information to show that the air we breathe is polluted.

有许多资料表明我们呼吸的空气已受到污染。

It is claimed that soap powders pollute the water we drink.

据说肥皂粉污染了我们的饮用水。