Each year, the emissions rights initially granted to polluters on the basis of historical experience would be ratcheted down.

"If you are interested in exiting your business," he said, "then trading all your emissions rights might be an attractive opportunity."

The trading of emissions rights would allow America to pay other nations to achieve the rest.

The utilities are now free to clean up their own mess, or to buy emissions rights from others who can trap sulfur at lower cost.

The trade in emissions rights is immoral to my mind and rather than solving the problem, it shelves it.

The trade in emissions rights is one such instrument.

So those that did not bother about the environment in earlier times are selling emissions rights to those who have cleaned up their industry.

The wealthiest countries will be able to go on polluting by buying emissions rights from others, and that is unacceptable.

The trading of emissions rights must now be restructured.

This will affect in particular countries with weaker economies that do not have the money to buy these emissions rights.