That amount of money would provide a lot of CSP power, a proven, working and simple technology that would work now, not in 2056.
Dan Lewis, energy expert at the Economic Research Council, calculates that CSP costs US$3 million to US$5 million per installed megawatt, one-fifth the cost of fusion.
"Fusion is basically a job creation scheme for plasma physicists," he said.
"Nuclear power accounts for just 3.1 percent of global energy supply and would be hard pushed to provide more. Yet CSP could supply 30 percent or 300 percent of future energy demand far more simply, safely and cost effectively. In the wake of the Stern report the enlightened investment is on hot deserts, not uranium mines or oil wells," he said.