Lanzatech uses a proprietary bacteria to convert 'dirty' waste gases from industry into ethanol that can be used as a fuel. It has run a pilot plant scale development to prove the technology at the Glenbrook Steel Mill, out of Auckland, since 2007, and has recently signed an agreement to build a demonstration plant at Baosteel's Shanghai steel mill.
Aside from Lanzatech's success in making the 2010 list, the site is a fantastic resource for what is happening in the cleantech sector right now. There is some incredible innovation happening - and proof that we have some of the solutions for combating climate change. The next challenge will be in how to scale them.