Jeffrey Siegel

Professor of Civil Engineering at the University of Toronto

Jeffrey Siegel on KCRW

Air purifiers and filters are a hot commodity these days. A lot of the top-recommended models are sold out pretty much everywhere.

How to make indoor air safer from wildfire smoke and coronavirus

Air purifiers and filters are a hot commodity these days. A lot of the top-recommended models are sold out pretty much everywhere.

from Press Play with Madeleine Brand

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“[Last year] wasn't a one-two punch show, more just COVID. ... Our kids were at home or remote learning or hybrid [learning].

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Governor Gavin Newsom signed into law a historic bill for California last week.

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