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free speech

Nine Years After Filing a Lawsuit, Climate Scientist Michael Mann Wants a Court to Affirm the Truth of His Science

The case raises difficult issues about free speech in an era of online misinformation and disinformation.

By Marianne Lavelle

 Scientist Michael Mann attends the New York screening of the HBO Documentary "How To Let Go Of The World And All The Things Climate Can't Change" on June 21, 2016 in New York City. Credit: Slaven Vlasic/Getty Images for HBO

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