Nate Lewis, the George L. Argyros professor of chemistry at Caltech, will begin on Thursday a two-night lecture series on "Where in the World Will Our Energy Come From?," said Jet Propulsion Laboratory spokesperson Alan Buis.

Lewis will discuss the investments, economics and resources that will be necessary to create energy sources. The lecture series takes place at NASA's Jet Propulsion Library, 4800 Oak Grove Drive, Buis said.