A future after oil and gas? Norway's fossil-free energy start-ups

Petrochemicals are still king in Norway, but the country has a growing renewables sector

iyvind Christian Rohn spent more than two decades in the oil and gas industry. But the 50-year-old from Skedsmo, near Oslo in Norway, has just set out on a new fossil-free career path: developing offshore solar power technology.

His alternative energy startup, Ocean Sun has developed technology that will mean solar farms can float on the ocean surface, with their power transmitted back to land. Since physical space is limited in population centres, especially in areas of high growth such as South East Asia, Rohn's idea is to use the ocean's surface around the world.