You seem to confuse "country" with "government." This government has lied about global warming precisely to avoid ratifying the Kyoto Protocol. So it isn't exactly two separate things and it isn't a national trend, it is a governmental trend.
Clinton signed the protocol and even shamed Republican President Nixon created the Department of the Environment. Americans themsleves are in fact environmentally aware and conscious, though some moreso than others.
In any case, it may be too early to tell but I thought it may be interesting to see into the 2008 Presidential elections; the only thing that isn't so totally depressing about the States right now.
Democratic candidates:
Sen. Hilary Clinton
Sen. Barak Obama
Former Sen. John Edwards
Sen. Joe Biden
Republican candidates:
Sen. John McCain
Sen. Sam Brownback
Former Mayor Rudy Giuliani
Sen. Mike Huckabee
Good God let Obama win it.