Solid waste data sourcing

Datasets. Each lives in /_waste/data/

mpca_score - County-level waste generation from Minnesota counties in 2021. Has an associated metadata
waste_emissions - calculated final emissions numbers, including original waste data, from Minnesota. metadata not yet written

Documentation. Started, not completed.

Checklist

Please complete this checklist as a courtesy to the PR reviewer.

Code and styling

[x] All of the files/scripts I added are in the right place and named appropriately. See the README for details.
[x] I have not used setwd()
[x] I have used file.path(here::here(), "file_name")) to source any scripts or read in data
[x] I have not added any large datasets, unless absolutely necessary (explain)
[x] I have commented my code, particularly in hard to understand areas
[x] I have added additional package dependencies as necessary to renv with renv::install()
[x] I have run styler::style_dir(".", recursive = TRUE, filetype = c("R", "qmd"))
[x] Plots
- [x] If plotly, have you "source" argument that matches the chunk name?
- [x] correct formatting using councilR::plotly_layout()?
[x] chunk formatting
- [x] all chunks named
- [x] all figure or table chunks have caption
- [x] out.width: "95%" and out.height: "60%"

Document editing

[x] I have named my code chunks
[x] My plots have succinct and accurate figure captions using #| fig.cap: "{caption here}"
[x] I have used out.width and out.height in percentage format in figure configuration
[x] I have ensured that modified documents knit successfully from render_for_publication.R
[x] I have ensured the chapter I've modified knits successfully
[x] I have fixed any missing citations
[x] I have reviewed my contributions for typos and misspellings.

GitHub and project management

[x] I have identified and assigned at least one Reviewer (Liz, Sam, Laine) to this PR
[x] I have assigned myself to this PR
[x] I have updated the status in the GitHub Project