We don't really know how much trouble we are in with global warming, but if it continues, experts tell us to expect flooding in coastal areas, intense storms, droughts, regional food and water shortages, mass migrations, and social upheaval. There is probably a tipping point, the point at which anthropogenic global warming becomes irreversible, so there is an urgency to developing safe, clean, cheap energy. Scientists and engineers are in a race to find a solution.