Ключевые слова: action, adventure, advocate, backpacking, beauty, care, cleaning, cleanup, community, donate, eco friendly, environment, forest, giving, green, group, healthy, hiking, inspire, landscape, make a difference, mountain, national park, natural, nature, outdoor, park, planet, positive, preservation, preserve, protect, recreational, recycle, respect, responsibility, reuse, safe, save, scenic, service, sustainability, sustainable, trail, trash, trekking, volunteer, waste, wildlife,