Clouds gather over Kyoto climate pact By Robin Pomeroy ROME (Reuters) - Defying repeated premature reports of its death, the Kyoto Protocol will come into force in a few days. But doubts are already growing over the long-term future of the world's most ambitious environmental agreement. As developed countries struggle to meet their greenhouse gas reduction targets by the treaty's "first commitment period" of 2008-12, they also have to start discussing what happens next. "The nay-sayers have all said Kyoto will never go into force, now they have been proven wrong," said climate campaigner Steve Sawyer of Greenpeace. "Now what...