Our society faces a choice. We could be enjoying a sustainable lifestyle but we have chosen not to. In three generations we have consumed half the oil produced by photosynthesis over eight million generations. In two generations we have used half our uranium resources. With threats from global warming, oil depletion and nuclear disaster, we are running out of options. Solar power, as Keith Barnham says, is our necessary solution.Barnham explains that the roots of solar energy lie in a litt...