The other follows on Sept. 27 and Sept. 28 in Washington, when US Secretary of State Condoleezza Rice will chair a meeting of 16 countries that together account for some 90 percent of global emissions.
The US insists the Washington meeting simply aims to clarify matters so that at least everyone knows who is offering what, and any deal will feed into the UN process.
Even so, suspicions run deep among greens and in Europe that the US wants to subvert the mandatory Kyoto approach and replace it with a voluntary, technology-driven tack.
The Washington conference "is in spirit an attempt to block" the Kyoto process, an internal memo by a European government said.
It calls on EU members to be "perfectly united in the face of the American initiative."