Western Climate Initiative

And then we got the California model, which is quite interesting because it's more of an approach where countries design a system in a common way, or states in this case.

They had a whole process that A number of states in the Western U.S., the Western Climate Initiative, co-designed a program.

By the way, they borrowed that idea from REGI, the Regional Greenhouse Gas Initiative in the Northeast U.S., and states could opt in.

or not.