The short answer is yes. Bison are uniquely adapted to living on the prairie, and "treading lightly" on their environment. Unlike beef cattle, they do not hang out around water sources, sparing fragile wetland ecosystems. Their grazing patterns have a positive environmental impact, their hooves leave depressions that hold rain water, and their dung serves as a powerful fertilizer. This only holds true for grass grazed bison. Avoid grain fed bison. For more information, see Real Food Encyclopedia | Bison.