 Thereafter, it doubled in the next 10 years, and then it is doubling again, maybe over a slightly longer span.The world steel industry flattened from 2007–2009 at 1,300 million tonnes, before rising again, due to worldwide recession starting in 2008, with its heavy cutbacks in construction, sharply lowered demand and prices falling 40%.Showing the impact of that plateau, in 2007 ThyssenKrupp spent $12 billion to build the two most modern mills in the world, situated in Alabama and Brazil.