In late May, the California Air Resources Board (ARB) released a concept paper and held a workshop in Sacramento to discuss strategy for a new initiative to control emissions of Short-Lived Climate Pollutants (SLCPs)-methane, black carbon, and fluorinated gases ("F-gases," which include hydrofluorocarbons). Because of their high global warming potentials, ARB estimates that SLCPs account for about 19% of California's current greenhouse gas (GHG) emissions (expressed as CO2eq) and are responsible for about 40% of the global warming experienced to date.

The SLCP plan will ultimately result in the development of regulations targeting emissions from several sources, including those listed below.

  • Methane
    • Landfills
    • Dairies and other operations involving ruminant animals
    • Natural gas distribution and use
  • Black carbon
    • Diesel and gasoline-powered vehicles and engines
    • Wildfires and prescribed burning
    • Residential wood burning
  • F-gases
    • Refrigeration systems
    • Foam blowing agents
    • Aerosol propellants

The workshop elicited comments from a large and diverse group of stakeholders. According to ARB staff, a draft SLCP strategy will be published by this fall, and the staff's proposed SLCP plan will be presented to the Board in the spring of 2016.