FROM BRUTAL heat in North America and Siberia to devastating flooding in China and Europe, 2021 delivered worsening climate extremes of the kind long predicted by scientists. Streetcar cables melted in Portland. A raging river swept away entire homes in Germany's lush Ahr Valley wine region. And wildfires have set records across the globe in the past two years. For many people, recent disasters have transformed human-caused climate change from a theoretical, far-off risk to an undeniable reality. And this summer, the United Nations dropped a landmark climate report, emphasizing that avoiding even worse impacts will require deep, rapid cuts in greenhouse gas pollution. But does that mean 2021 will be remembered as the year denial of climate change all but died?
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