Clean bill might get messy for owners: Complying with new law could cost millions; some to make case for rollbacks.

The article discusses the challenges faced by some Spokane-area building owners in complying with the Washington state Clean Buildings Act, which aims to reduce greenhouse gas emissions; larger building owners are expected to spend millions on upgrades to meet energy-use and performance regulations, with opposition from real estate advocates due to ambiguous rules, limited input, and high fines. It mentions that despite concerns about the cost and impact on historic buildings.