Cumulative global investment in clean tech technologies in the seven years ending last year came to $1 trillion, reports Bloomberg Clean Energy Finance. Despite the weakness in 2011 of the advanced industrial economies, total clean tech spending grew an impressive 5 percent. In the last seven years, which have included a couple years of severe recession, clean tech investment has grown by an an astonishing average of 25 percent per year.
The United States accounted for almost a fifth of global clean tech investment in 2011, regaining a lead it had lost to China two years before. That tidbit prompted theFinancial Times to lead its Friday paper with the Bloomberg report. But it is by no means the only significant detail of the report and arguably not the most important by a long shot.
