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      "title": "Guttikunda & Jawahar — Can We Vacuum Our Air Pollution Problem Using Smog Towers?, Atmosphere 11(9):922 (2020)",
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       "value": "Peer-reviewed pre-construction critique: a Delhi-scale pilot tower filters about 0.00002% of the winter airshed. 'With no boundaries, it is unscientific to assume that one can trap air, clean it, and release into the same atmosphere simultaneously.'",
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     "A missing archive, publication date or content hash is shown as null rather than inferred.",
     "The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim."
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 ]
}
