In fact, you can build a cascading series: If we don't do anything in 10 years, here's the damage, in dollars, with error bars. If we don't in 20 years, here'

In fact, you can build a cascading series: If we don't do anything in 10 years, here's the damage, in dollars, with error bars. If we don't in 20 years, here's the damage then. In 30 years, and 50. But the numbers have to be defensible, or they're going to get shredded by people who don't want to do something.