Check out reviews!
By reading the reviews, you can learn what the service of those hotel are provided. You can learn how those hotels are maintain Eco friendly. The news sites and blog sites give a suggestion about Eco friendly hotels and resorts. These sites show the feature. This feature can help you to book the hotels. Apart from there are many Eco friendly where the guests write down the reviews of the hotel. The sites are TripAdvisor, Expedia, Hotels.com are allowed to leave reviews.