Waxman Markey

President urges Congress to pass bill, as climate envoy confirms US will still oppose deep emission cuts

But green groups accuse senators of watering down proposals as part of compromise package

As US climate bill clears latest hurdle, Steven Chu warns there will have to be a compromise on emission targets if further delays to legislation are to be avoided

Emission targets watered down to secure support of wavering Democrats, as backers insist bill could still pass this year

Officials say president Obama will push forward controversial plans for 100 per cent auctioning of carbon allowances, but news reports suggest otherwise

Capitol Hill insiders express confidence over Waxman-Markey climate bill