One concrete suggestion:
https://forum.effectivealtruism.org/posts/oZff425xLnikfxeGD/pat-myron-s-shortform?commentId=s8Qoydhg3zZ3b3486

Agree the bottom comment is significantly more complex than reactions. The top 2 could be reactions 

Reactions seemingly serve that purpose better:
https://forum.effectivealtruism.org/posts/oZff425xLnikfxeGD/pat-myron-s-shortform?commentId=HsadBx85nAggb8Q5T

Robots cost ~$2k/acre (similar to annual landscaper hiring costs), so they're cheaper than riding mowers or landscapers. Additional costs are for push mowers who don't value avoiding mowing time. Adjacent neighbors without fences/walls/etc. could seamlessly share a robot

Many entities require mowing; rules must change before certain individuals can mow less

Injuries have been relatively steady for decades, are often male, residential, and involve riding mowers

While injuries are mostly residential, landscaping (and pollution and labor cost/time) mostly isn't. Municipalities, parks, schools/colleges, sports complexes, golf courses, cemeteries, and farms regularly mow hundreds of acres each

Certain robotic mowers handle surprisingly steep angles (45°)

The latter: practical conditions rather than theoretical ideal environments, especially for installation site modifications where ventilation, tooling, and oversight is more limited

USA has ~85k annual mowing injury ER visits:
https://pubmed.ncbi.nlm.nih.gov/29395756/
~44% of which are fractures and amputation:
https://pubmed.ncbi.nlm.nih.gov/30067452/
Lawncare's also ~5% of USA pollution:
https://www.bloomberg.com/opinion/articles/2021-05-21/lawn-mowers-are-the-next-electric-frontier
https://www.epa.gov/sites/default/files/2015-09/documents/banks.pdf

Autonomous mowing robots eliminate most of mowing's danger, pollution, labor cost/time, and noise

While quartz countertop sales grow, millions of people have silicosis from inhaling silica dust:
https://bmcpublichealth.biomedcentral.com/articles/10.1186/s12889-023-16295-2
Hundreds of thousands died in the last couple decades from the incurable disease.

Australia's the first country to enact a ban:
https://www.theguardian.com/australia-news/2023/dec/14/australia-will-become-the-first-county-to-ban-engineered-stone-bench-tops-will-others-follow

>100k fishers die annually:
https://www.pewtrusts.org/en/about/news-room/press-releases-and-statements/2022/11/03/more-than-100000-people-die-annually-across-global-fishing-sector-new-research-shows
https://www.pewtrusts.org/en/research-and-analysis/issue-briefs/2022/11/more-than-100000-fishing-related-deaths-occur-each-year-study-finds
even despite wild fishing plateauing for decades in favor of fish farming:
https://ourworldindata.org/rise-of-aquaculture

0.55% voting for a recent shareholder proposal (Microsoft) alerted me that shareholder proposal ownership requirements are lower than I imagined:
https://www.sec.gov/divisions/corpfin/rule-14a-8.pdf
Even a couple thousand dollars invested for a few years suffices

Would love to hear more about how the wedding campaign went!