Cattle farming methane is a massive contributor to the greenhouse effect. This process would reduce methane output as well as consume carbon dioxide, another greenhouse gas. It would help us in our fight against climate change.

Cows are one of the worst things for the environment. Massive production of methane at the cost of more water and land than any other protein source. Getting rid of methane works be the quickest way to dent global warming given how much worse than carbon it is (in the near term )

why do rich people want to replace any living being with a silicon version ?

Because then they can patent it.

So it's no surprise that Bill "Anti-Food-Security" Gates, the world's most famous patent racketeering parasite, has his vile little fingers in this.