let's see. PG&E sells 970 billion cubic feet of gas per year [1] and the most recent study I could find pegs the CO2 output of electrical generation at 456 lbs

let's see. PG&E sells 970 billion cubic feet of gas per year [1] and the most recent study I could find pegs the CO2 output of electrical generation at 456 lbs per MWh in 2007 [2] (which is pretty low), and generated or bought about 80 terawatt-hours in 2014 [3] 456 lbs * 80,000,000 megawatt-hours = 36.5 billion lbs CO2 or 1.65 million metric tons from electrical generation/purchased generated power. Natural gas releases 117 lbs of CO2 per thousand cubic feet [5] so 970 million * 117 lbs = 5.148 million metric tons. California as a whole emits 359 million metric tons of CO2 per year [4] and PG&E generates 27% of the power in California, 27% of 359 million is 97 million metric tons. PG&E sells products which directly contribute 6.798 million metric tons, or about 7% of what I would consider "their share" It's honestly lower than I was expecting but still significant. [1] https://www.pge.com/en_US/safety/how-the-system-works/natural-gas-system-overview/natural-gas-system-overview.page https://www.pge.com/en_US/safety/how-the-system-works/natura... [2] http://www.pgecorp.com/corp_responsibility/reports/2007/environment/energy-future.html http://www.pgecorp.com/corp_responsibility/reports/2007/envi... [3] http://www.pgecorp.com/corp_responsibility/reports/2015/bu01_pge_overview.jsp http://www.pgecorp.com/corp_responsibility/reports/2015/bu01... [4] https://en.m.wikipedia.org/wiki/List_of_U.S._states_by_carbon_dioxide_emissions https://en.m.wikipedia.org/wiki/List_of_U.S._states_by_carbo... [5] https://www.eia.gov/environment/emissions/co2_vol_mass.php https://www.eia.gov/environment/emissions/co2_vol_mass.php