"Clearly the Montreal protocol is not enough to reduce the risk."

Under the Montreal protocol, production is to be frozen at 1986 levels, then cut in half by 1999.

The Montreal Protocol itself has had additions made to it no less than four times.

In 1987, representatives from 43 nations signed the Montreal Protocol.

Since 1987 world production is reduced under the Montreal Protocol and banned in most countries.

China has repeatedly said it will honor all current rules of the Montreal Protocol but does not want to add new ones.

As another example, he cites the passage of the Montreal Protocol in the late 1980s.

He and others are working hard to get these extremely powerful greenhouse gases incorporated into the Montreal protocol.

We've been doing pretty well since the Montreal Protocol.

In consequence, the Montreal Protocol has often been called the most successful international environmental agreement to date.