The academy said that television viewing could affect the mental, social and physical health of young people.

The academy says 90 percent of cataract patients get their good vision back.

The academy said the nation could and should reduce medical mistakes by 50 percent over the next five years.

The academy would not say how that would be done.

More than 100,000 of those who suffer from Alzheimer's disease die each year, the academy said.

The academy said the question of "How much is enough?"

The academy said no word had come yet on the conclusion of the experiment.

"We believe that global environmental change may well be the most pressing international issue of the next century," the academy said.

The academy said its study would be completed in January 2001.

The academy said it was willing to consider the request.