$6/gal
https://www.marketwatch.com/story/us-subsidies-lead-to-pover...
https://www.realagriculture.com/2018/02/u-s-dairy-subsidies-...
https://news.ycombinator.com/item?id=17997055
(The US spends about $22 billion on dairy subsidies each year)
I imagine the true costs (and climate impact) of soy and oat milk are lesser than dairy because animal husbandry isn't involved.
https://www.fb.org/market-intel/usda-report-u-s-dairy-farm-n...
https://www.lancasterfarming.com/farming-news/news/there-are...
https://www.ers.usda.gov/amber-waves/2022/june/fluid-milk-co...
https://sph.umich.edu/pursuit/2019posts/cows-milk-human-heal...