Pregnant women are wise to avoid to reduce the likelihood of mercury exposure.

Pregnant women are advised to avoid eating long-lived predatory types of fish like sharks, swordfish and albacore tuna. These types of fish contain high levels of mercury and may have harmful effects on the fetus. Avoiding these types of fish could also reduce the risk of mercury exposure/poisoning. 

Urban growth invariably feeds increased commercialization and industrialization. it requires continually expanding land areas. when urbanization rates are high, and countries do not have the institutional and managerial capacities or economic wherewithal to manage such rapid growths, they exert intense pressure on the types and nature of the resulting settlements. they contribute to the development of overcrowded slums and shanty towns without adequate essential services and necessary infrastructure.-by asit k. biswas and cecilia tortajada