Northstar Clean Technologies recently announced a new product line. The Calgary-based company is focused on waste-to-value technology, specifically the sustainable recovery and reprocessing of asphalt shingles as part of a circular economy. The new product from Northstar involves separating and recovering limestone from shingles. “By extracting limestone directly from asphalt shingles, we’ve been able to […] The post Northstar Patents Limestone Recovery Tech to Boost Circular Economy of...