Thank you so much to the witnesses for being here.
Professor Weaver, I'm going to start with you. I was wondering if you could elaborate on your comments. Your presentation was short.
You were talking about the importance of stabilizing the CO2 concentrations in the atmosphere and saying that the impacts we see on climate change—and I think we all agree around this table that the debate is over, that climate change is occurring, and that it's being caused by human activity—of the carbon we put into the atmosphere now are going to accelerate for...how many years?