Not Clearly Pro or Con to the question "Can Alternative Energy Effectively Replace Fossil Fuels?"
"In a sense, it's very strange that modern society struggles so much to find a source of clean and abundant energy: After all, the power in the sunlight falling on the Earth exceeds civilization's needs by almost four orders of magnitude. If we harnessed even a tiny fraction of a percent of that total, we could dispense with the more messy and problematic forms of energy that we rely on so much today."
"Solar Energy's Red Queen: Conventional Photovoltaic Panels will be Hard Pressed to Displace Fossil-Fuel Use Anytime Soon. But a Different Kind of Solar Cell Might Well Do So," American Scientist, Jan. - Feb. 2008