But they have been linked to contamination and illness in the past, and proposals to more tightlyregulate the industry practice have been debated in Congress.
In this respect, we need to heed one of the lessons of this Hall: it will do no good to tightlyregulate a market only to see the bulk of activity flee beyond our reach.
Curiously, for their part, environmentalists expect to be able more tightly to regulate the oceans and to bar activities that endanger the health of their waters, flora and fauna, such as drilling and mining.