The environmentally friendly, 3-pound Enviro-Log is sold individually and burns for up to two hours. Enviro-Log uses 100% recycled waxed cardboard (typically used to transport fruits and vegetables to produce processors, grocery stores, and restaurants) to manufacture its earth-friendly firelogs. Compared with firewood, the Enviro-Log’s burn is cleaner (emitting 30% less greenhouse gas, 80% less carbon dioxide, and 86% less creosote), while also providing 50% more heat per pound.