Whale oil
Peder Bogen founded A/S Suderø, originally in Sandefjord, as another Danish-Norwegian venture in 1901. In 1908 he built a guano factory and used the product to endure seasons with poor yields or low whale oil prices. Competition continued to increase and as many as six shore stations operated from 1906 to 1911. After production peaked in 1909, Grøn left the Faroes in 1911 only to lose several ships at sea, including a floating factory. Grøn returned for successful 1914–15 seasons but was unable to make a significant catch in 1916. From 1917 to 1920, World War I interrupted whaling in the Norwegian Sea, and it was hoped that whale stocks had recovered in that time. Whale oil prices had dropped in 1920 along with the possibility of profitable whaling. Regardless, one Norwegian company continued to operate in the Faroes until the 1930s.