You could mention on your site, when choosing the provider, which of them are offering "green hosting". I.e. use wind/solar/water powered data centers, and adopt other green practices. Especially given that you are one of the rare that I could find, that allowed me to select Google Servers, who have 100% sustainable energy (and not wood burning either) on their servers.

Maybe it would also help the non-technical people to have some of the terms (when creating the server and launching it) translated to more "human-readable" -format. I could imagine some environmentally conscious people would be then choosing your service as it both gives them the ability to choose a server that fits their values, and also helps in starting that (without having to go directly to GCE for example).

Thanks for the trial, and the service you are providing, I'll recommend it to those people who it seems like a right fit! (esp. because of the choice of some green servers)

Best,
Leo