With the help of researchers at NRRI, ash trees killed by the emerald ash borer are being repurposed in pilot projects in Minnesota as biochar . This material can filter harmful chemicals from storm water runoff, enhance soil microbial health, increase soil drought resistance and store carbon in soils to mitigate climate change. KUMD talks with Jim Doten from the City of Minneapolis Environmental Services and Health about how biochar is being piloted in the Twin Cities for environmental