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What Portland's soil crisis can teach us about heavy metals in the garden

from Civil Eats

The news that toxic heavy metals have been detected at high levels around two glass factories located in residential neighborhoods has rattled the city of Portland, Oregon. These metals — primarily arsenic, cadmium, and chromium — are used to color glass and were found in moss samples collected around the city over the past few years and also in air sampling, the results of which were first made public early this year. more

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