My view is that this is so extraordinarily important to people the world over, that to not have a debate on it is irresponsible. To suggest that we know everything we need to know about these issues is irresponsible. And I will take all the criticism that comes with it. Anybody that tells you that they got this figured out is not being truthful. There are too many complexities around climate science for anybody to fully understand all of the causes and effects and consequences of what you may chose to do to attempt to affect that. We have to let scientists to continue their investigative work, unencumbered by political influences. This is too important to be cute with it.