Igumbi elibandayo liyindawo eyodwa yokugcina impahla, enezinga lokushisa elithile elifiswayo legumbi kanye nomswakama ngesiqandisi semishini kanye nobuchwepheshe besimanje bokunakekelwa okusha, ukugcina imikhiqizo ekhethekile embonini yokudla, imithi, inyama, izithelo, imifino, amakhemikhali, ukudla kwasolwandle, ukutshala, ezolimo, ukuhlolwa kobuchwepheshe, okuluhlaza. impahla kanye nebhayoloji.