Forget the outer planets, the earth has its own gaseous giant in the form of L'Air Liquide (Air Liquide). The world's second-largest industrial gas supplier (after Linde), Air Liquide has more than 130 subsidiaries in 70 countries, with a clear strength in Europe. It specializes in industrial gases (oxygen, nitrogen, carbon dioxide, acetylene, and helium) used in welding, heat treatment, plastic production, and other processes; the company also sells medical gases (oxygen, nitrogen, nitrous oxide). Its markets range from aerospace and food processing to steel and oil refining.
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