To be a climate change skeptic in Paris this week means facing heavy odds.

Arrayed against them are thousands of environmentalists, scientists and even big business leaders who have come to U.N.-sponsored climate talks to pledge their commitment to cutting the man-made emissions that an overwhelming majority of scientists say are warming the planet.

Unlike at past U.N. summits, where their presence was a fixture, the mostly American skeptics have this time been forced to hold court at a downtown Paris hotel, dogged by climate change activists handing out "Wanted" flyers accusing them of responsibility "for destruction of our future."