I'm afraid to answer that question, because I just don't know enough; I don't want to mislead you.
On April 21st, 2009. See this statement in context.
On April 21st, 2009. See this statement in context.
Associate Director, Energy Efficiency Center at University of California, Davis, and Senior Scientist, Lawrence Berkeley National Laboratory, As an Individual
I'm afraid to answer that question, because I just don't know enough; I don't want to mislead you.
See context to find out what was said next.