Ineed a proposal to identify the effect on this pollution on human health and the environment
explain the cause of this pollution
recommend ways to prevent/clean up this type of environment pollution

Ithink i might know wait one second let me serve

Answer (b) they're often rural migrants with no title to housing or rights to established businesses

If a particular resource is not useful or needed then the price would be considerably low. once that resource is needed the price or value will raise depending on how useful or needed it is especially if the resource is low in quantity, the consumers would pay whatever they have to, to get that material.