The plan is the most ambitious yet in the effort to control harmful emissions through the forces of the free market.

A department spokesman said the new standards would reduce harmful emissions from the generators by 50 percent or more.

The 100 mpg car is being promoted by Google.org in an effort to reduce oil use and harmful emissions.

"They're trying to hide the harmful emissions coming from their vehicles."

New technologies make it possible to cut harmful emissions and provide even more growth.

Reducing these harmful emissions must be a national priority, and it requires action at every level of government.

President Bush has focused on a long-term effort to find new ways to produce energy without harmful emissions.

Motor vehicles account for 72 per cent of all harmful emissions.

They add that, when burned, the plastics might release harmful emissions.

The air seemed pure so the dome gave off no harmful emissions.