Great product & great hunt.

Every multi-national company found guilty of polluting any water-way, anywhere in the world should be fined heavily (like enough to actually effect their bottom line and put them off doing it again).

Then the proceeds of these fines should go to supplying whichever local population they've affected with enough of these (or similar products - including filters) to last every man, woman and child at least 1 year.

That would cut down on pollution.