Tashin zafi na duniya

Menene ke haifar da tashin zafi na duniya?

  1. gurbacewa! hanyoyi, jiragen sama, masana'antu. yankewa dazuzzuka.
  2. masana'antu, sufuri da irin wannan
  3. mai konewa, tuki motoci tare da babban injin, hayaki daga bututun masana'anta da sauransu
  4. gurbacewar muhalli
  5. tururin masana'anta, hayaki, adadin motoci marasa iyaka..