Yakhelwe ngezinto ezingasindi ezingenawo amakhemikhali, lokhuIndwangu yokulawula ukhula engalukiwe isebenzisa ubuchwepheshe obuthile ukuvimba ukhula. Ikhuthaza ukukhula kwezitshalo ngokugcina inhlabathi ipholile futhi inomswakama, ibhondi ephothiwe ukuze kugcinwe ukugeleza komoya okuzinzile, amanzi, kanye nemisoco. Umgoqo wokhula ulungele ukubeka ngaphansi kwenhlabathi, i-mulch, utshani bakaphayini, amatshe amancane, namadwala, futhi usebenza kahle ngokulinganayo ezindaweni ezinabantu abaningi.