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Questions and Answers on Ann Arbor's 2023 GHG Inventory
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Questions posed by John Mirsky. Responses (in green) from Carissa Ebling unless otherwise noted.
1. It would be nice if OSI's stackbar charts in the presentation included the sum of all emissions at the top of each bar (even if they have to be manually inserted in PowerPoint as text boxes).
a. While I didn't include the value for the total emissions each year on these slides, you can find that information in our dashboard: https://analytics.a2gov.org/superset/dashboard/osi-performance-metrics/?standalone=2.
2. I would appreciate more of the type of analysis that you provide at the end of the slide deck posted to Legistar.
a. Slide 9 is revealing. Given we have collectively averaged and more or less consistently delivered an approximate 1 - 2% annual decline in emissions since 2000 as measured by the simple inventory and since 2015 as measured by the expanded inventory - and even since 2020 (as compared to 2019) when substantially more resources have been dedicated to climate action - it seems we aren't decarbonizing fast enough in spite of all of the recent A2ZERO-related actions and successes. If not, what is being - or needs to be - changed going forward?
i. We've seen a 27% drop in our GHG emissions since 2000. We expect much more significant drops in the coming years due to programs ramping up as well as significant changes in our energy portfolio due to the SEU and DTE's commitment to generate 50% of their energy from renewable sources by 2030.
b. What are the key takeaways when it comes to the main drivers of either emissions reductions or increases? For example:
i. In his public comments at the beginning of our last commission meeting, Ken Garber told the commission that - while other things are clearly going on, as reflected in your presentation slides - the full drop in emissions from 2022 to 2023 could be solely attributed to DTE cleaning up its electrical power fuel mix. This seems to ...
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