2018 US CO2 emissions:
1.2 trillion tons CO2 from transportation fuel (gasoline/diesel)
1.2 trillion tons CO2 from coal for electricity
0.6 trillion tons CO2 from natural gas for electricity
(And more, but those are the biggest identifiable chunks that stand out, the biggest usage sectors of oil, coal, and gas.)
So, electrifying cars and trucks would be cool and we should do that too, but making the power grid sustainable is something we can do with big policy hammers.
sources:
https://www.eia.gov/totalenergy/data/monthly/pdf/flow/petroleum.pdf
https://www.eia.gov/totalenergy/data/monthly/pdf/flow/natural_gas.pdf
https://www.eia.gov/totalenergy/data/monthly/pdf/flow/coal.pdf
https://www.epa.gov/energy/greenhouse-gases-equivalencies-calculator-calculations-and-references
