For large numbers of today's travelers, a property's potential impact on the environment can be just as important a factor (if not more) as the types of amenities available when booking decisions are being made. As many as 70 percent of millennials in fact indicate a preference to stay with brands featuring a strong environmental reputation, while 65 percent of corporate travel planners now prioritize booking stays at eco-friendly hotels.

https://www.hotelexecutive.com/business_review/7612/finding-the-key-to-hotel-sustainability-with-security-access-technology