Ключевые слова: alternative, america, cartography, center, continent, earth, eco, ecofriendly, ecologic, ecological, ecology, energy, environment, environmental, equator, geodesy, geography, global, globe, goal, green, hemisphere, icon, map, meridian, nature, navigate, objective, ocean, photosynthesis, planet, red, renew, renewable, resource, responsibility, reusable, reuse, science, sea, solution, sphere, surface, sustainability, sustainable, target,