NSF recently accepted a claim by Celceram that their fly ash product - widely used in carpets is post consumer recycled content. I think this is outrageous as do several other certifying bodies and at least one carpet manufacturer. Looks like LEED will need to tighten up their definition of post consumer recycled content to stop this greenwash. See more on this at http://www.pharosproject.net/blog/detail/id/144/from-smokestack-to-floor...

This comes at an interesting time just as USGBC has added significant new material credits to LEED V4 that address toxic content and that highlight responsible sourcing of raw materials. The sourcing credits start to put the kind of spotlight on the impacts of agricultural and mining practices that the FSC credit has long put on forestry practices. An excellent move IMHO. I've got critiques of how they are structured now that I'll post soon, but the direction is great.

Maybe it is also time to take a close look at the sustainability of recycling practices too and adjust LEED credits to incent those products that facilitate true closed loop recycling and avoid the production and recirculation of toxic materials.