Environmentalists, who are nothing more than mindless agents of globalism and mega corporations, do not understand anything about agriculture, they only think about the "environment", in fact they lie. Who are the most harmful to the environment if not these same corporations ? The cow manure is an excellent resource, you can capture the gas in some capture object and biodigesters, and create biogas, bringing energy independence to small, medium and large farmers, you can use biogas in electric generators that are powered by gasoline for example, so you replace gasoline with gas, at no cost, generating electric energy for your farm and your home. The cow manure also serves to make compost, and the liquid or "juice" of the extract serves as liquid fertilizer. The dry extract has no smell and can also be used as fuel for furnaces and heating, or cooking, and maybe even small thermogenerators, it is an alternative to coal, for example, Mongolia is a country that does not have trees, and the extraction of coal mining is prohibited by the government, so the only alternative is to import gas from other countries or to use dry cattle manure for heating. Cattle bones and fat can be used to make broth, and soap, fertilizer, animal feed, etc. Environmentalists work for mega corporations, globalism, banks, to compel countries to become dependent, etc, take for example that trash called Greta Thumberg, a mentally retarded girl, feminist and idiot, says that cow flatulence is a threat to the environment, but in fact the cow manure can be extremely useful to farmers, this can bring independence for any country, as I proved above. youtube.com/watch?v=OV2P_bPVyYo (Or just search biogas production and uses.) With cattle you can have energy, fertilizer, meat, milk, fur, leather, etc. Now add corn to that, corn is extremely useful, with corn you can create biofuel, and use the smashed corn as food for people, or as a additive for food, ration, etc.