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CO2 carbon dioxide emission reduction, carbonic greenhouse gas reduce, green clean eco technology. Neutral, low air pollution. Ecology control smoke cloud in atmosphere. Environment protection. Vector
Sweaty kid from sweltering heat during his walk wipes sweat from his forehead exhausted.
Close-up of a car exhaust pipe showing dirt and wear underneath the vehicle.
Woman, stress and neck pain in office for business, overworked and fatigue in Japanese company. Mature accountant, burnout and injury in workplace with muscle tension, sprain and massage for relief
Need for sleep. High level fatigue. Exhausting work in school causes fatigue. Teacher woman sleepy face tired sit table classroom chalkboard background. Life of teacher exhausting. Yawning teacher.

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