How confident does he feel about those kinds of predictions? "That's a great question. There's ways that you can build confidence in these things," he says. These simulations are able to basically re-create the Earth's climate as we see it today. "What you see are patterns in the models that reflect what you see in the real world. We know we must be getting something fundamentally correct in order for that to happen."
There's also a moral duty to future generations that will live amid the climate devastation being created now.
"Here's a provocative thought: Maybe we should protect our kids by not having them," Rieder says.