ノルスク・ハイドロ
During the 1930s there was a global depression, and Norsk Hydro make an alliance with IG Farben and Imperial Chemical Industries; the rise of protectionism was causing problems due to Norsk Hydro only selling 5% of the produce domestically. This was followed by many lay-offs, and not until 1938 was Norsk Hydro able to make a profit again. During the 1930s other products came into production, including hydrogen and other gases, and from 1934 as the first plant in the world mass-produced heavy water, following a production plan by Leif Tronstad and Jomar Brun.