POLYMER CONTAINS RENEWABLE INGREDIENTS BioStride from Armstrong Commercial Flooring is a polymer that creates less dependence on petroleum and fossil fuels because it contains rapidly renewable, U.S.-grown plant ingredients. The first application of BioStride, which is 13 percent biobased content by weight, is MIGRATIONS BioBased Tile. The tile combines environmental attributes with enhanced performance, a classic look and affordability. (717) 397-0611 / www.armstrong.com Note: This article has been updated since its first publication online and in print.