Trading in 'cap and trade'

By Tim Flannery
The international climate negotiations that have been grinding on for years may have crossed a Rubicon of sorts. That's because a new model of engagement for some nations is receiving wide attention. It's shorthanded as "national schedules," and it could get incorporated into the next world climate treaty -- the one that replaces the Kyoto Protocol -- to be signed in Copenhagen in December. (read more)