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Having completed several degrees in environmental science, Hannah Ritchie nearly left the field out of helplessness and frustration, worried she would never make a real difference. Today, she's a passionate advocate for changing climate messaging, replacing what she believes are paralyzing--and often false--claims with empowering arguments that people can embrace. Listen as the head of research at Our World in Data talks with EconTalk host Russ Roberts about food emissions, low-carbon technologies, and what the data shows about what matters (and what matters much less) when it comes to climate change.