Unit 4: Population and Air Pollution
Course Objectives Covered by This Unit
Evaluate the detrimental effects of chemical and biological contaminates on human health and the environment.
Some people may come into contact with a chemical and never be harmed. Others may be more sensitive and get sick. Sometimes illness happens only if you are exposed to a harmful substance for a long time. Many factors play a part in whether you get sick from contact with chemicals, including • The kind of chemical you are exposed to,
• How much of the chemical you were in contact with,
• How long the contact lasted,
• How often you were exposed,
• How it entered your body, and your health.
Apply methods of modern science to real environmental issues. Recycling, and neutralizing wastes, government regulations for pollution output and disposal.
Evaluate the scientific basis of the major environmental issues facing society today. Water: We need to be concerned about water pollution as well as about the increasing scarcity of drinkable water in this world. Air: However, air pollution causes serious health problems and threatens the natural environment of the planet which means that this is actually one of the most important areas of environmental concern that we can start working to change today Waste and Land Pollution: Toxic waste, such as the placement of electronics into landfills on a wide scale basis, is a major issue but all areas of waste are of concern. All waste ends up leading to the other types of pollution and causing problems for the environment in addition to taking up much-needed land space. Climate Change Issues: Climate change is a major environmental concern because of the fact that even small changes can cause significant problems for large portions of the world. Climate changes are resulting in an increase in the number of worldwide natural disasters like floods and hurricanes.CO7
Analyze the impacts of contemporary human activities on the earth’s processes. CO9
Correlate energy consumption with its impact on humans and the environment. The environmental impact of electricity generation is significant because modern society uses large amounts of electrical power. This power is normally generated at power plants that convert some other kind of energy into electrical power. Each such system has advantages and disadvantages, but many of them pose environmental concerns. Dams and the reservoirs can be used to supply drinking water, generate hydroelectric power, increasing the water supply for irrigation, provide recreational opportunities and to improve certain aspects of the environment. However, adverse environmental and sociological impacts have also been identified during and after many reservoir constructions. The environmental impact of nuclear power results from the nuclear fuel cycle, operation, and the effects of accidents. Wind power consumes no fuel, and emits almost negligible air pollution, unlike fossil fuel power sources. The energy consumed to manufacture and transport the materials used to build a wind power plant is paid back with a typical energy return on investment of about 20%, placing wind in a favorable position relative to other forms of power generation such as fossil fuels, nuclear and solar. While a wind farm may cover a large area of land, many land uses such as agriculture are compatible, with only small areas of turbine foundations and infrastructure made unavailable for use.
Unit Learning Outcomes
Explain the four factors that produce changes in population size.
Birth Rate, Death Rate, Immigration, Emigration.
Explain earth’s carrying capacity for humans.
Carrying Capacity is the largest population a particular environment can support sustainably if there are no changes in that environment. LO28
Explain how highly developed and developing countries differ in population characteristics, such as infant mortality rate, total fertility rate,...
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