Ключевые слова: alternative, business, campaign, carbon, clean, co2, collaboration, cooperation, corporate, document, earth, eco, ecological, ecology, emission, energy, environment, environment friendly, environmental, environmental protection, footprint, friendly, global, green, group, hand, hand stack, icon, meeting, merging, net, office, paper, people, pollution, recycle, renewable, stack, sustainability, sustainable, symbol, synergy, table, team, teamwork, unity, warming, working, zero,