Huatulco is the most clean and green place in Mexico ---
Most tourists in Mexico have simple needs; a vacation destination with beaches, hot weather, good food, and a party atmosphere. Other tourists look for a more authentic cultural experience or opportunities to connect with nature, which Mexico offers in abundance.
Connecting with nature, though, is usually not a priority in the larger tourist centers - the natural environment represents the postcard fantasy that serves as the background for tourist activities. Cleanliness of the local environment and its sustainability are not given much thought by tourists or Mexicans, so it’s no surprise that environmental pollution is a large, but largely ignored, problem.