Problems such as pesticides from agricultural fields could be reduced if a natural pesticide was used, or the fields were moved farther away from the local waterways.. 
KỌ̀Ọ̀KAN omi ìṣubú ti wà ní dammed ati omi ti wà ní ìdarí sí agbára ibùdó; ọ̀kọ̀ọ̀kan ninu èyí tí ó ní  àwọn olùpilẹ̀ṣẹ̀.. 