President Bush pledged Friday to ban export of U.S. toxic wastes for disposal abroad, a practice that has provoked outrage in Third World nations targeted as dumping grounds.

Bush said he would propose legislation to halt export of such wastes except where the United States has an agreement with the receiving country providing for the safe handling and management of such materials.Bush made the announcement at the swearing-in of Louis Sullivan as the new secretary of Health and Human Services. Bush said that toxic exports from industrialized nations to developing countries posed growing health risks worldwide.

"We're determined to work with other concerned governments to exercise wise stewardship over our environment," Bush said.