nyc deli & tobacco shop and Smoke in old Brooklyn building in the Fort Green neighborhood of Brooklyn, New York Stock Photo EV Grieve: East Village Smoke

A Native Prayer you may want to use while smudging: Creator, Great Mystery Source of all knowing and comfort, Cleanse this space of all negativity

Back then, I spent a couple of afternoons at the Wellcome Library in London where there is a large collection of ASH documents going back to the group's inception in 1971

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Peer review Peer review information Nature Communications thanks the anonymous reviewers for their contribution to the peer review of this work