Yes, I laughed at that, too.
Hotels love using fake environmentalism to charge/save money.
Reminds me of the signs in the room asking you to reuse your towels several times, in order to save wildlife from all the detergent runoff. These messages are usually on some kind of paper sign with pictures of cute bunnies or dolphins.
My response: Pass some of the savings along to me, and I'll be glad to reuse the towel "to save the environment". Otherwise fuck you.