Ключевые слова: alternative, america, blue, cartography, continent, earth, east, energy, environment, environmental, equator, geodesy, geography, global, globe, hemisphere, hexagon, icon, map, meridian, nature, navigate, north, ocean, planet, renew, renewable, resource, responsibility, reusable, reuse, science, sea, solution, south, sphere, spherical, surface, sustainability, sustainable, warming, west, white, world, www,