How does sexual reproduction increase variation within a species

It allowed the EPA to find toxic waste sites and force the responsible parties to clean up the sites.

Explanation:

The Love Canal tragedy occurred in Niagara Falls and resulted one of the worst ground water pollutions in the United States.

A large ditch was used for dumping of urban wastes in the 1920s. In the 1940s the US army dumped wastes from World War 2 there.

Estimated 21,000 tonnes of harzardous wastes like carcinogens benzene and PCBs.

Health problems like miscarriages, chromosome damage and birth defects began occuring in the community.

The Superfund a government programme aimed at cleaning up the worst harzardous chemical waste sites was instituted.

Hundreds of such sites have been cleaned up.

Polluters contributes to the clean up efforts