How can a company that covers so many different products and industries ensure its pricing is fair to its affiliated companies?

The costs of collection and treatment of the various products are carefully documented. Overheads are allocated equally (these costs are minimal in relation to treatment costs). This means that the environmental fees for a particular product group are only spent on covering this product group’s costs. There is no cross subsidisation, neither in the short-term nor the long-term. The trade organisations decide how the fixed costs are allocated within the various product groups.