In the next greenhouse worms and bacteria did their job to turn this mixture into fertiliser. A handfull brought the pure and earthly smell of nature to my nostrils. The last greenhouse unveiled a row of fresh looking potato plants. She also presses dried slurry into fireballs for stoves, allowing people to cook their food once more. And follow the call of nature afterwards. Closing the circle. Again and again. Sustainable for sure. No more cutting trees for firewood or chopping wood for fertile soil. If she succeeds, these zebras may quietly go on grazing while we live a greener life with enough food and fuel to eat our every meal.