Ключевые слова: agriculture, bio, biology, care, conservation, creative, day, defense, development, earth, eco, ecological, ecology, ecosystem, environment, environmental, environmentally, forest, friendly, garbage, gardening, global, globe, green, grow, growth, hand, hold, holding, hope, land, life, nature, peace, philosophy, planet, plant, pollution, protect, protection, recycling, responsibility, save, social, soil, sphere, sustainable, tree, world,