An environmentally friendly hospital in Wales hasn't worked out well. As Robert Burns said, the best laid plans of mice and men often go awry. Radically different designs require a lot of detailed analysis which most conventional builders are not able to supply, and owners cannot afford. Doing something in a new way, something not done before, is the reason that aircraft and spacecraft design costs so much. Environmentalists do not understand the high level of investment in analysis required to successfully do things in entirely new ways. They also fail to appreciate the unintended consequences of radical design changes.