Actively Improving the Environment. Stronghold employs 21st-century crypto mining techniques to remediate the impacts of 19th- and 20th-century coal mining in some of the most environmentally neglected regions of the United States. Our Bitcoin mining operations are powered through the reclamation of coal refuse sites across Pennsylvania. We remove coal refuse from piles and burn it in an emissions-controlled manner at our wholly owned generation facilities. Coal refuse is classified by Pennsylvania as a Tier II alternative energy resource (same as large-scale hydropower), and we receive both Coal Refuse Energy and Reclamation Tax Credits and Pennsylvania Tier II Alternative Credits to incentivize reclamation. Coal refuse is the environmentally harmful byproduct of Pennsylvania’s legacy coal-mining operations. Coal mining began in earnest in Pennsylvania in the 19th century and continued through the 20th century to meet the nation’s growing demand for steel, fueling the industrial revolution and two World Wars. Up until the passage of the federal Surface Mining Control and Reclamation Act of 1977, the lower-quality coal refuse was disregarded in large piles across Pennsylvania.Stronghold restores the land and local waterways once void of life and vegetation and makes them safer for families and residents, before donating the land back to local communities. Operating in partnership with the Pennsylvania Department of Environmental Protection and local environmental authorities, Stronghold has already reclaimed ~1,000 acres of once-unusable land in Pennsylvania.