Nathan Lewis: Powering the Planet: Where in the World Will Our Energy Come From? 5/25/2005 [56k modem] [broadband] [cable/DSL] 67 minutes In a Watson lecture, Nate Lewis, Argyros Professor and professor of chemistry at Caltech, discussed what it would take for the world to turn away from fossil fuels and switch over to renewable energy. He outlined the hurdles that must be overcome in order to power the planet with abundant, clean, inexpensive energy in the 21st century.