Every business generates wastes - things that are unwanted, unneeded or simply in the way. At the same time, every business buys raw materials, supplies and equipment. Many times, one business will buy what another business is disposing. Both would benefit if the transactions were with each other. This is the principle of Resource Exchange.
Most wastes are useful for something.
Companies that have surplus raw materials. Companies that have off-specification products, which cannot be marketed. Companies that have obsolete products or equipment. Companies that generate by-products, which are not marketed by their sales staff. Companies looking for ways to reduce disposal costs.