The main reasons are to found in the adverse effects that industrialisation, urbanisation, air pollution, traffic noise etc. have on the environment.
Izizathu ezizizo zakufumaneka zentsebenziswano nokuchasene nezoshishino uguqulo ibenesimo sedolophu ungcoliseko lwomoya ingxolo eyenziwa yingxinano eziyenzayo kwindalo njalo-njalo