A step forward

Last week the Herald reported:

A marathon UN climate conference yesterday approved a roadmap towards an accord that for the first time will bring all major greenhouse-gas emitters under a single legal roof.

If approved as scheduled in 2015, the pact will be operational from 2020 and become the prime weapon in the fight against .

This is the first useful step forward in some time. Any agreement that does not include the major emitters has next to no environmental value. It is significant that China, US and India have all agreed in principle.

Actually gaining agreement on the details of post 2020 reductions will be incredibly challenging. As there is  an economic cost to reducing emissions, there will be resistance from vested interests.

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