 As the Los Angeles Times reported in March of 2010, U.S. clean energy investments hit $18 billion last year, a report from the Pew Charitable Trust said, a little more than half the Chinese total of $34 billion. Five years ago, Chinese investments in clean energy totaled just $2.5 billion. The United States also slipped behind 10 other countries, including Canada and Mexico, in clean energy investments as a share of the national economy.