Guests use linens and towels freely, perhaps not realizing that they are washed daily and that there are costs associated with that.
A simple card can make guests aware of the environmental costs of excessive laundry, and can provide them with a way to indicate their preference to re-use towels or linens. A sample is shown below.
This initiative is visible to customers. Handled well, there is a public relations benefit with associating your facility and your brand with environmental responsibility.