The 'red line' issue that exposes deep divisions in the Paris climate talks | Lenore Taylor

Calls by the US and Australia for tougher requirements on how developing countries' emissions are reported on and checked have met with fierce resistance

Buried in the detail of the Paris Accord could be some innocuous-looking words that will have a powerful impact on whether it ever delivers the greenhouse gas reductions it promises.

The words could "paper over" deep divisions about whether countries ever have to properly report and account for the promised emission reductions that collectively limit global warming to the already-dangerous 2.7 degrees.