Ключевые слова: air, atmosphere, breathe, change, clean, climate, concept, day, disaster, earth, eco, ecological, ecology, environment, environmental, future, gas, global, green, hand, harmony, health, life, lifestyle, liquid, natural, nature, one, outdoor, oxygen, ozone, paper, planet, pollution, protect, protection, protest, radiation, rescue, risk, safety, save, saying, speech, stop, sustainable, symbol, voice, water, world,