IPCC Tier 2b Emissions Calculation Methodology Categorías Topics Climate Change, Industry & Manufacturing Programs Semiconductor Tipo Information Contact Semiconductor Correo electrónico semiconductor@arb.ca.gov Teléfono (279) 208-7884 The Regulation to Reduce Greenhouse Gas Emissions from Semiconductor Operations requires the use of the Intergovernmental Panel on Climate Change (IPCC) Tier 2b emissions calculation methodology to calculate GHG emissions. Related Resources August 2025 Joint Auction #44 Notice California Post Joint Auction #43 Public Proceeds Report May 2025 Joint Auction #43 Summary Results Report