They are also fed grains and soy in varying percentage depending on regions and countries.
There is also still the use of land, energy, fresh water and the methane emissions typical of cows.
This is another break down of the above-mentioned study: https://ourworldindata.org/land-use-diets
You can see that indeed, the USA does better than other countries on not dedicating crops to animal feed, but it is still about 14%, while the world average is around 40%. Isn’t that a lot that could be earned back?
In European cities, the worst noise over capacity ratio is motor scooters and those large motorbike that are designed for noise (such as Harley-Davidson).