Intergovernmental Panel on Climate Change produced a report for the International Energy Agency (IEA) states that the cost for reducing human C0<sup>2</sup> 50% by the year 2050 will cost an estimated $45 Trillion dollars.<ref>[http://www.businessgreen.com/business-green/news/2218500/iea-calls-trillion-energy], Businessgreen.com, IEA calls for $45 trillion energy "revolution", June 6, 2008</ref> | Intergovernmental Panel on Climate Change produced a report for the International Energy Agency (IEA) states that the cost for reducing human C0<sup>2</sup> 50% by the year 2050 will cost an estimated $45 Trillion dollars.<ref>[http://www.businessgreen.com/business-green/news/2218500/iea-calls-trillion-energy], Businessgreen.com, IEA calls for $45 trillion energy "revolution", June 6, 2008</ref> |