While traveling in france, jim and his wife, both americans, were concerned about how much they can afford to spend in europe because sometimes the u. s. dollar will buy more goods and sometimes it will buy less, based on changing economic conditions. this change in the values of currencies and how they fluctuate in relation to each other is known as the rate.

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

Many citizens are in danger of contracting a food-borne illness.more people are living with chronic illnesses.pathogens are becoming stronger and harder to defeat.

Ibelieve its c not quite sure.