I pointed this out to him via email and he acknowledged that he had mistakenly used data for total emissions vs the electric power sector. He promised to issue a correction but I never saw it.
It appears that Ember gets their data from the IEA. Based on my research and data available at the EIA, https://www.eia.gov/electricity/data/state/ , the numbers differ slightly from those presented here, for NM where I live, carbon intensity numbers for 2001 are 944 vs 765 and 489 vs 434 for 2021.
Vermont looks great (slide 5) - until you realize production fell sharply when they prematurely closed Vermont Yankee (and made up for it with hydro from Quebec and nuclear from NH). Essential to include data on production volume imho.
Nice charting. Seems I should branch out from Excel.
I think the renewable electricity biz involves a bit of double counting. Many wind and solar farms still sell renewable energy "certificates." So Amazon or GM may say a warehouse in Missouri or factory in Kentucky uses 100% renewable electricity, but that renewable power is really just serving the customers in Oklahoma or Iowa. I know you specify "generation" but folks may overestimate how much renewable power is contributing nationwide by hearing both numbers.
Also, IMHO, the gas industry and gas power plants get a pass by using only onsite CO2 emissions to determine the GHG intensity of power. Upstream and midstream methane venting and leakage add 10% to 50% depending on the calculation of methane-fueled generation's CO2e and assumptions and attribution of loss fractions. Big error bars. Of course coal mines vent some methane too.
Great work! Would it be possible to add "nuclear" to the "Share of electricity by source across US states" map on slide 4?
Hannah,
This is good stuff. I appreciate the link to Ember.
A couple months ago, Harry Stevens at the Washington Post had tried to do something similar but he had grabbed the wrong dataset from the EIA, the US Energy Information Administration, https://www.washingtonpost.com/climate-environment/interactive/2023/clean-energy-electricity-sources/?itid=ap_harrystevens .
I pointed this out to him via email and he acknowledged that he had mistakenly used data for total emissions vs the electric power sector. He promised to issue a correction but I never saw it.
It appears that Ember gets their data from the IEA. Based on my research and data available at the EIA, https://www.eia.gov/electricity/data/state/ , the numbers differ slightly from those presented here, for NM where I live, carbon intensity numbers for 2001 are 944 vs 765 and 489 vs 434 for 2021.
I'm not sure why the difference???
Just FYI and Thanks,
Dean
Nicely done...
Thanks for putting together 😁
good job!
Is there still a case for a Vermont homeowner to put solar panels on her roof?
that figure becomes money if the products made in that state face an EU CBAM. example here: https://grid.is/@ngogerty/low-carbon-benefit-by-energy-source-g_q7rS_dShi:0t:g_sgrzA
Vermont looks great (slide 5) - until you realize production fell sharply when they prematurely closed Vermont Yankee (and made up for it with hydro from Quebec and nuclear from NH). Essential to include data on production volume imho.
Amazing work. Thank you!
Nice charting. Seems I should branch out from Excel.
I think the renewable electricity biz involves a bit of double counting. Many wind and solar farms still sell renewable energy "certificates." So Amazon or GM may say a warehouse in Missouri or factory in Kentucky uses 100% renewable electricity, but that renewable power is really just serving the customers in Oklahoma or Iowa. I know you specify "generation" but folks may overestimate how much renewable power is contributing nationwide by hearing both numbers.
Also, IMHO, the gas industry and gas power plants get a pass by using only onsite CO2 emissions to determine the GHG intensity of power. Upstream and midstream methane venting and leakage add 10% to 50% depending on the calculation of methane-fueled generation's CO2e and assumptions and attribution of loss fractions. Big error bars. Of course coal mines vent some methane too.