Following up on Wendy's question, we are working with a number of laboratory buildings and an aquarium. They purchase ongoing consumables such as chemical reagents, aquarium salts, and fish food. There are no "green" alternatives to most of these products, at least at present, given the narrow functional requirements. To me it makes the most sense to exclude these products from both MRc1 and MRc2, but I haven't seen anything in the Reference Guide or elsewhere that establishes this as an acceptable approach. Any experience on this?