1. Global Greenhouse Gas Emissions Data;U.S. Environmental Protection Agency,2017
2. CAIT Climate Data Explorer;World Resources Institute,2017
3. Sources of Greenhouse Gas Emissions;U.S. Environmental Protection Agency,2018
4. California Greenhouse Gas Emission Inventory - 2018 Edition;California Air Resources Board,2017
5. Assembly Bill 32 Overview;California Air Resources Board,2014