Road surface layers of smaller stones, until the road surface was composed of small stones compacted into a hard, durable surface. "Road metal" later became the name of stone chippings mixed with tar to form the road surfacing material tarmac. A road of such material is called a "metalled road" in Britain, a "paved road" in Canada and the US, or a "sealed road" in parts of Canada, Australia and New Zealand. A granular surface can be used with a traffic volume where the annual average daily traffic is 1,200 vehicles per day or less. There is some structural strength if the
Material of the Future a worldwide view from a variety of perspectives considering what the true value of plastic is. Covered topics include re-usable plastics, plastic pollution, plastic industry, controversies of plastic recycling, bioplastics, and plastics in human health. The film includes footage from Chinese recycling facilities, the world's largest plastics convention, the Los Angeles bag ban, heart replacement surgery, the Plasticarium in Brussels, and is interspersed with interviews from scientists, authors, artists, and environmentalists. The film is scored by Richard Swift with additional music from Baths and a previously unreleased track from Animal Collective. Material of the Future Material of the Future is