On the surface, CAISO’s Extended Day-Ahead Market and SPP’s Markets+ will take similar approaches to accounting for greenhouse gas emissions — but important differences remain.

CAISO is recommending it implement a Western Power Trading Forum proposal that could help the EDAM track and account for GHG emissions in a way that considers the variety of carbon pricing programs across the West.

CAISO stakeholders and staff could soon be weighing two options for enabling the EDAM to track GHGs in a way that accommodates the patchwork of different carbon reduction programs across Western states.