a prescriptive and a performance method to meet the requirements. CALGreen 2010 also covers items that weren't covered before like multiple showerheads and irrigation controllers. Policy tools CALGreen 2010 uses prescriptive regulation (it provides technical characteristics that have to be met in the construction of new buildings). Economists and industry, often criticize this kind of regulation because it provides little reason for innovation once the regulated party has achieved the required standard. However CALGreen provides just the minimum standard to achieve and it delegates to Local authorities to increase the level of the standards to apply (depending on the particular characteristics of the local area). This tool is the most effective to solve in the long run the environmental problems faced by this policy because fixing technical characteristics that have to be followed in the construction process it assures that all the new buildings will have certain desirable characteristics of efficiency. CALGreen 2010 alleviates the environmental problems connected with residential and non-residential structures, but it doesn't solve them both because it is limited to the new buildings. Stakeholders There are a lot of players interested in CALGreen and in its evolution. Policy targets are important stakeholders: designers, architects, builders, property owners and in general also businesses, the government and its agencies. Some of the stakeholders try to influence the evolution of the policy participating to CBSC's and HCD's Green Building Focus Groups (stakeholder focus groups). They are: building officials; representatives from the construction industry; representatives from the environmental community; state agency representatives and public members. There are also government agencies involved. A part from CBSC, HCD, DSA, and OSHPD, the following agencies contribute to the formulation of the policy: Air Resource Board (for standards concerning air pollutants), California Integrated Waste Management Board (CalRecycle) (for what concerns landfill disposals), the Department of General Services, the Department of Public Health, the Department of Water Resources and the Energy Resources Conservation and Development Commission (Energy Commission). Building officials are interested in the policy because they want to know what are the new standards and what processes lead to them in order to understand how to do their job in the best way possible. Construction Industry is very interested in influencing the policy because changes in the standards could mean changes in suppliers and maybe also increasing costs and they are mainly interested in minimizing costs. Producers of plumbing fixtures or companies that produce