translation.en: But if you wanted to keep growing cattle in a time and place where water resources are limited, you're growing seaweed in the water, you don't have to water it -- major consideration.
translation.zh: 但如果你希望能继续养牛， 而所处的时令和地区水资源又有限， 就可以在水里种海带， 还不用浇水-- 很值得考虑。