Marble, granite, limestone, onyx, travertine, sandstone, slate.
Agricultural products: wheat, corn, soybeans, rice, cotton, sugarcane, etc.
minerals: iron ore, copper, aluminum, limestone, etc.
fossil fuels: coal, oil, natural gas, etc.
timber: pine, oak, cedar, etc.
livestock: cattle, pigs, chickens, etc.
fish: salmon, tuna, cod, etc.
plant fibers: cotton, flax, etc.
metals: steel, brass, aluminum, etc.
plastic resins: polyethylene, pvc, pet, etc..
