Some of the niches have gigantic potential. Iceland and California should have a huge lead in geothermal. Germany has a couple of leading companies in solar p

Some of the niches have gigantic potential. Iceland and California should have a huge lead in geothermal. Germany has a couple of leading companies in solar panels. Denmark in wind. China is at the top of the list in coal pollution; solving that puts them at the head of the class in clean coal. Twenty-first century manufacturing is up for grabs; MI and PA should be in the running.