National Public Radio: Secretary Chu is a Nobel Prize-winning physicist who came into office with high hopes. He was selected to help the president pursue his green energy agenda and fight climate change. It turned out to be a rocky road. Some of the green companies that got big government loans, like Solyndra, ended up going bankrupt, and the president had to drop his plans to get Congress to adopt climate change legislation. Still Chu helped the country make progress in becoming more energy efficient.