Reuters: US, UK rules cement idea that gas is low-carbon:Gerard Wynn

Proposed U.S. limits on carbon emissions from fossil fuel power plants follow British rules in stigmatising coal and could store up new CO2 problems if a wave of gas plants follows.

Both proposals drive a wedge between gas and coal by setting emissions limits which would allow gas, but stop new coal-fired power plants unless these were fitted with expensive, unproven carbon capture and storage (CCS) technology.

They imply that natural gas is alright as far as carbon emissions are concerned, for now, but coal isn't.  MORE