The issue with using byproducts as animal fodder is that ruminants produce a lot of methane while digesting them. This enteric fermentation in their stomachs accounts for around 6% of global greenhouse gas emissions, while the entire aviation industry sits at just 2-3%. If we give them more food that is harder to digest, they'll emit even more methane per animal.
Biofuels make a lot of sense though. After extracting the fuel, the remaining digestate can be used to produce biochar or be put directly on fields as fertilizer, which is nice because synthetic fertilizers account for 1-2% of greenhouse gas emissions.
Another option is to burn the byproducts for heat or electricity in winter during short periods when there's not enough wind and solar power to cover energy demand.
Isn't there some cow probiotics that can greatly reduce the farting? I'm sure deploying cow Beano at scale couldn't possibly have its own set of problems!
Sun worship is considered the most primitive of religions, and yet that's where everything comes from. Everything. From food to heat to energy. Even fossil fuels is captured sunlight from the past, and radioactive material for nuclear power is from ancient supernovae. Everything. All praise the Sun!
I do tire of explaining to vegans that differences in soil quality mean that crops fit for human consumption cannot be grown everywhere and that making the best use of the land available often involves turning it into food via an intermediary
Hemp needs to be used for a lot more things since it is a very versatile plant.. I can't imagine living in Louisiana with the horrible ethane cracker plants.