Now after President Obama's call for climate legislation in the State of the Union address, lawmakers are discussing proposals that would reduce carbon emissions, but not include a cap-and-trade system for emissions of carbon dioxide and other greenhouses gases, Richard Cowan and Timothy Gradner of Reuters report. "It's open to how you price carbon," Massachusetts Democratic Sen. John Kerry told the reporters. "People need to relax and look at all the ways you might price carbon. We're not pinned down to one approach."