Carbon credits generated by forestry "sinks" under the Kyoto protocol's clean development mechanism (CDM) will be time-limited because of the scientific uncertainties surrounding them, ministers have agreed at climate talks in Milan which ended on Friday.
The decision means world governments have virtually finalised the protocol's rules on carbon sinks: besides the accord on credits under CDM, a separate set of guidelines on accounting for sinks in national climate gas inventories was adopted. Now only rules for the crediting of small-scale sinks projects remain to be agreed.
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