Higher dumping fees, dwindling lumber reserves, and widespread environmental awareness are encouraging more of us to pay attention to where our building materials come from and where they are going. There is already a surprising number of off-the-shelf building products made from recycled or readily-renewable resources. Many of these materials require less energy to produce, and create less environmental impact, than similar products made from virgin resources. Here are a few such resource-efficient building products: Old-Fashioned Linoleum Forbo makes a high-quality linoleum that probably isn't too different than the stuff your grandmother used to have. It's made from all natural ingredients, including linseed oil from flax, pine resins, wood flour from deciduous trees, and cork. These are mixed with clay and chalk fillers and