I'm not making this up: https://www.fastcompany.com/3028933/these-backpacks-for-cows-collect-their-fart-gas-and-store-it-for-energy https://www.fastcompany.com/

I'm not making this up: https://www.fastcompany.com/3028933/these-backpacks-for-cows-collect-their-fart-gas-and-store-it-for-energy https://www.fastcompany.com/3028933/these-backpacks-for-cows...