Unpollute

Suppose the President were to say (copying some language used once before) that, before the end of this decade, we shall unpollute the Great Lakes.

Source: wiktionary

And it is now time for the industry to fully realize that it cannot escape its responsibility to unpollute the American drinking environment, just as other industries have found that they cannot escape their responsibility to unpollute the natural environment.

Source: wiktionary

If he wants to unpollute something, let him unpollute the movies. All them nudies.

Source: wiktionary

How can we throw off the mantle of ethical invisibility and, at the same time, unpollute the atmosphere and the environment, and, as one black poet wrote, "clean out the world for virtue and love"?

Source: wiktionary