Several players are taking steps to design and implement trading schemes in the United States.

In any trading scheme, picking a baseline - the point from which emissions increases and reductions are measured - is controversial.

His father is off pursuing some vague foreign trading scheme, while his mother has moved to Tokyo.

Later that year, his elaborate offshore trading scheme, being conducted through a secret account in the Bahamas, began to unravel.

The addition of the wild-card teams for the playoffs altered the trading scheme last year and is at work again this season.

The unanticipated twist in the market may have implications for other trading schemes that are proposed or now beginning.

Was he holding them as pawns in some sinister trading scheme that he had not yet made apparent?

The trading scheme may makes things more efficient, but the underlying level of pollution needs to be determined by the authorities.

I also think that we should still work with those other parties around the world who are planning to get some kind of trading schemes.

New changes are being made to the trading schemes.