BioPower's Hardwood fuel pellets are 100% natural and made in Northern Ontario. All wood, no additives in these pellets - a sustainable supply of renewable energy. Sustainability and lifecycle: Lifecycle assessments and governing administration analyses propose that sustainably sourced wood pellets may have decrease greenhouse fuel depth than fossil fuels, https://rafaelikmps.angelinsblog.com/37915348/a-review-of-pure-biofuel-ltd