RTCC: Countries around the world are developing an array of different carbon taxes and trading systems to control greenhouse gas emissions.
The more these can be joined up, experts say, the cheaper it will be to tackle climate change.
This argument is gaining ground among businesses and developed economies, but advocates fear anti-capitalist Latin American states could use UN climate negotiations to block it.
Dirk Forrister, CEO of the International Emissions Trading Association (IETA), says there...