To weather with WDDC, we worked on the initiative for hotel sustainability basics. Basics is 12 very concrete elements that will help anybody, a second super to see that progress is being made. The hotel industry is very diverse, so we came together to define that starting level, that is really solid, that everyone can do, and that is now verifiable. Process for becoming verifiable is very simple. It's regulatory interest on the WDDC website, and we will then direct you to our verification partners, we'll be able to take you through the process. There's so many different programs at hotel basics, I think it's going to be a good one, that allows everyone to get involved and they need to have one currency that everybody understands. When I did the verification in my hotel, 80% of the items are already there. There's a return in the efficiency, so utility cost being very high at this time. So anything you do to reduce your energy cost, to reduce your carbon footprint, to reduce your water, to reduce your waste strains, you're going to save money doing so. The sustainability solid is very well defined, it's an actional, if I can already take action, and it's very fireful, and actually the consumers who will come to my hotel will know that what I'm doing is a writer.