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RT @guardian: 'So they knew': Ocasio-Cortez questions Exxon scientist on climate crisis denial – video theguardian.com/business/video/2019/oct/23/exxon-alexandria-ocasio-cortez-congress-testimony-climate?utm_term=Autofeed&CMP=twt_gu&utm_medium=&utm_source=Twitter#Echobox=1571865037