The California Air Resources Board (CARB) passed the AB 32 Scoping Plan Thursday (press release; LA Times).
AB 32 is California's landmark 2006 law to reduce global warming emissions to 1990 levels by 2020, about 30% from business-as-usual projected for 2020, 15% from today’s levels. The long-range goal is 80% from 1990 levels by 2050.
The largest two sectors of greenhouse gas emissions (left) are transportation — 38% — and electricity generation — 23%.
(click to enlarge) This timeline shows CARB's first milestones in 2007; developing the high-level Scoping Plan over the last year; and the upcoming detailed rulemaking through 2011 to implement it.
Following is the overview of how the Scoping Plan expects to reduce emissions.
Recommended Reduction Measures — Counted Towards 2020 Target (MMTCO2E*)
ESTIMATED REDUCTIONS FROM CAP AND TRADE PROGRAM AND COMPLEMENTARY MEASURES — 146.7
California Light-Duty Vehicle Greenhouse Gas Standards — 31.7
Energy Efficiency — 26.3
Renewables Portfolio Standard (33% by 2020) — 21.3
Low Carbon Fuel Standard — 15
Regional Transportation-Related GHG Targets — 5
Vehicle Efficiency Measures — 4.5
Goods Movement — 3.7
Million Solar Roofs — 2.1
Medium/Heavy Duty Vehicles — 1.4
High Speed Rail — 1.0
Industrial Measures (cap-and-trade sources) — 0.3
Additional Reductions Necessary to Achieve the Cap — 34.4
ESTIMATED REDUCTIONS FROM UNCAPPED SOURCES — 27.3
High Global Warming Potential Gas Measures — 20.2
Sustainable Forests — 5.0
Industrial Measures (non-cap and trade sources) — 1.1
Recycling and Waste (landfill methane capture) — 1.0
TOTAL REDUCTIONS COUNTED TOWARDS 2020 TARGET — 174
*Million Metric Tons of CO2 Equivalent emissions. Source (PDF), page 2, update to Proposed Scoping Plan (PDF), Table 2, page 17 (PDF page 37). Charts source (PDF).

