Carbon Positive: The chief Senate proponents of the troubled US climate and energy bill say it is still alive and almost ready for release. But the realities of a mid-term election year and the Louisiana oil spill have observers saying it will be a hard task from here to get legislation up in 2010. The on again, off again bill may be revealed to the US Senate in the coming week, its remaining sponsors say. Democrat Senator John Kerry and independent Senator Joseph Lieberman have both indicated they’ll …