None of this is to say that global warming isn't real, or that human activity doesn't play a role, or that the IPCC is entirely wrong, or that measures to curb greenhouse-gas emissions aren't valid. But the strategy pursued by activists (including scientists who have crossed the line into advocacy) has turned out to be fatally flawed.
By exaggerating the certainties, papering over the gaps, demonizing the skeptics and peddling tales of imminent catastrophe, they've discredited the entire climate-change movement