Despite the new federal drive for a national cap and trade system in the proposed Waxman-Markey bill, California continues to develop its own sub-national program for cap and trade, and a new vocabulary with it. At a workshop yesterday in Sacramento, the regulators and economists at California Air Board (CARB) wrestled with the definitions of “leakage,” “linkage (Did you know there are four types: “bilateral,” “unilateral,” “multilateral” and “indirect”?),” “abatement cost,” and “allocation cost” under a conceptual cap and trade system currently being developed. If you have preferences for the definitions of those words, CARB is seeking your views in writing by August 21.