Waste Exchanges   CalMAX - California Materials Exchange A free service provided by the California Integrated Waste Management Board designed to help business find markets for materials they have traditionally discarded. Businesses can list materials for exchange or find wanted materials. As part of the CIWMB's Border Waste Wi$e activities, they recently launched CalMEX, a bilingual expansion of CalMAX to serve businesses in the SD/Tijuana area. Links are provided to other exchanges and waste commodities trading systems. Recycler's World/The Recycler's Exchange A free worldwide information exchange for those who wish to buy/sell/trade recyclable commodities, used materials, and collectible items.