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Why people are talking about biochar. Good chance for northern lights this weekend

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A substance called biochar, which is made by cooking wood waste or other biomass at high temperatures without oxygen is getting a lot of attention in Minnesota. The resulting charcoal can store carbon dioxide for centuries.


And forecasters say a strong geomagnetic storm means there's a chance to see the northern lights this weekend.


This is an MPR News afternoon update, hosted by Elena See. Music by Gary Meister.


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