| A deal to limit carbon emissions from global civil aviation could be voluntary for the first five years instead of mandatory for certain countries under the current proposal, four sources familiar with the matter said.
Facing an October deadline, countries have been unable so far to agree on the metrics that would oblige participants to be included, said the sources, who spoke on condition of anonymity because they are involved in the talks and the idea of a voluntary first phase has not been made public...............................................Full Article: Source |