Runoff of chemicals called that are used in the agricultural industry to kill unwanted insects or rodents have limited the use of the mediterranean sea as a water source.

Runoff  of  chemical  called   urban  runoff  that  are used  in the  agricultural  industry  to  kill  unwanted  insects  or  rodents have limited  the use of the mediterrranean  sea  as  a water source.The  urban runoff  is a  runoff  created  in   urban   area.This  runoff  is  a major  source  of flooding and  water  pollution  in  urban  pollution.This  kind  off run  off  is  triggered  by  event  such  as  flash  flooding, overbank  flooding  and  snow  melting.

This would be Urban Runoff. Urban runoff is the water that runs off from rain, it is often one of the top sources of flooding as well as water pollution in urban communities around the world. As the water runs off and floods it often carries with it any chemicals sitting on the surface of the ground, this can be pesticides, cleaners, filth or any other type of chemical.