Include best-selling author and columnist Thomas Friedman among those unimpressed with the results of the United Nations climate summit in Copenhagen. "This conference produced a series of limited, conditional, messy compromises, which it is not at all clear will get us any closer to mitigating climate change at the speed and scale we need," he wrote. Friedman questions whether the process "to build a global framework to roll back global warming is broken: too many countries — 193 — and too many moving parts." Instead, Friedman thinks that the focus should be "getting the U.S. Senate to pass an energy bill, with a long-term price on carbon that will really stimulate America to become the world leader in clean-tech. If we lead by example, more people will follow us by emulation than by compulsion of some U.N. treaty."