Ключевые слова: abstract, around, arrows, background, blue, care, circle, concept, conservation, design, draw, drawing, earth, eco, ecological, ecology, environment, environmental, flat, friendly, global, globe, graphic, hand drawn, icon, illustration, international, isolated, land, line, linear, map, minimal, motion, outline, peace, planet, preservation, protection, rotation, round, safety, save, security, sphere, system, thin, universe, world,