Introduction Describe the major difference between the way energy flows through an ecosystem and the way chemicals flow through an ecosystem. Describe and distinguish between bioaccumulation and biomagnification. To help your explanation, use sketches of plants and animals, showing the units of toxins per individual. DDT was banned in the 1970's in the U.S.A., but is still used widely in many parts of the world to kill mosquitos that carry malaria, and to kill pests of bananas in places such as Central America, a major source of bananas in U.S. grocery stores. People practicing Hinduism are vegetarian.
Pollutants often have the greatest impact on poor people.
In areas where fish have high levels of mercury, such as Northern Minnesota and Florida, these local fish may be the main protein source for poor. Explain why these people face a greater risk of health problems from mercury than do people with higher incomes who fish in these regions only occasionally. Poor people often live in polluted areas near freeways and factories because housing is less expensive in these areas. These people also typically lack the power to prevent new polluters from moving into their neighborhoods. The cycle Draw the nitrogen cycle.