I've been doing this research on the environment for 30 years, before climate change was a big issue. Issues arise over time, and we have to be sensitive to changes in issues. We can't put all our eggs necessarily in one basket, because it may not be that basket that we want to put them in 15 to 20 years from now. It's going to change over time, and we have to be sensitive to that.
On May 1st, 2008. See this statement in context.