SCI 256 Environmental Science and Human Population Worksheet

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Environmental Science and Human Population Worksheet

University of Phoenix Material

Environmental Science and Human Population Worksheet

Using the textbooks, the University Library,or other resources, answer each of the following questions in 150- to 300-words.Be sure to provide references for the sources you use.

Question Response
Is the current growth rate of the human population sustainable? Explain, using the concept of carrying capacity. “The concept of carrying capacity was applied to human populations in the 1960’s” (Cohen, Czech, Nebel, 2000). If our resources become too little to sustain, then no, the human population cannot be sustainable due to the fact that more population means more resources will be needed to sustain life before food becomes artificial. Also, it depends in the environment that calculations are being based off and how easily resources can be obtained because of that fact, we as humans live off of animals and nature that fruit and vegetables grow out of the ground and trees, and if ever at any point the land becomes compromised…then we can no longer reproduce our resources. Due to genetically modified food, there has been quite a bit of controversy that this has been known to cause chronical diseases such as, cancer, diabetes, and many other cardio vascular diseases that the human population encounters in today’s era.
Using an internet search, provide a timeline of important events in the modern environmental movement since 1960. According to research on the internet, Rachel Carson is the originator of the modern environmentalist movement. Due to her book, people started to question chemical industries. Apparently, back in 1966 on Thanksgiving day, 80 people were killed because of air pollution. Another tragedy struck in 1969 due to an oil spill that prompted the National Environmental Policy act to pass because of the outrage it had caused in Santa Barbara. In the 1970’s, Earth Day was brought about and the, “Clean Air Act” was passed to regulate air emissions. Also, the “Clean Water Act,” and the “Endangered Species Act” was passed. In the 1980’s the, Compensation and Liability Act was passed to ensure that the federal government had a budget to help clean up hazardous areas, chemical spills, and other sites of emergencies that needed assistance because of contamination to the environment. Late in the 1980’s the, Nuclear Waste Policy act was passed along with the Emergency Planning and Community Right to Know Act passed, which helped the community to help and protect themselves against hazardous chemicals. Due to an oil spill in 1989, marine life and other animals were affected and passed away from the leak. In the 1990’s a few more acts were implemented to help sustain a healthy environment. The Oil Pollution Act was passed along with the Pollution Prevention Act, which focused on cost-effective modifications that an organization and business could manufacture to reduce the amount of pollution to improve their business. In the 21st Century the FDA, Drug, and Cosmetic Act was passed, and this allowed the EPA to determine how much pesticides could remain on the foods we eat today.
Perform an internet search using one of these topics: car, electronics, water bottles, plastic grocery bags, food choice, home size, commuting and incorporate the “environmental impact” they may elicit. Read one of the articles you find and explain:The environmental impacts of that item or activity.How you as an individual can reduce your impact on the environment as it relates to this item or activity. A Vehicle consumes a considerable measure of energy before it even advances toward the open street. Vehicle production leaves a mammoth footmark since materials like elastic, steel, plastics, glass, paints, and numerous more will be made before another auto is prepared to drive. Thus, the end of its life does not mean the end of its ecological impacts. Plastics, battery acids, toxic exhaust leaks, and different items can stay in the environment. Production, transfer and recycling expenses to the environment are difficult to calculate because it is quite difficult to control how everyone recycles their trash. They are likewise for the most part minor. The greater part of a vehicles environmental impact, maybe around 80 to 90%, will be as a consequence of fuel utilization and release of greenhouse gasses and air contamination, researchers say that greenhouse gasses are prompting an unnatural weather change such as global warming. Vehicles are one of the main causes for air pollution. Have you ever been in front of a car and you the exhaust pipe blows out black smoke? Of course you have, we all have and that hazardous air pollution that you and breathe in, and it is not good to breath in carbon monoxide, smog, or any other toxins that a vehicle might carry with them on the open road. To reduce the quantity of air pollution for your vehicle, you should get routine maintenance done on your car, which you have no choice anyways within the cities unless you live in a rural area like I did and didn’t have to. Also, keep up to date on your tires as well and report any vehicle you find suspicious to the local air agency.
Explain the relationship between three aspects of science: hypothesis, research/experimentation, and theory. Hypothesis is a rational prediction of causation among various variables. Research allows you to come up with new knowledge and allows you to expand the current knowledge base. Research is an innovative work that produces new information. This is an inventive occupation that is done scientifically with a specific end goal to build the data base of people. For the most part, a theory is trailed by information from your research. In science, a hypothesis is a tested, binding description for an arrangement of affirmed, well substantiated, built up components. A hypothesis is backed up by proof; a speculation is just a proposed conceivable result, and is falsifiable and testable. At the point when an issue happens, researchers, typically make a theory about the issue. They then apply various examination approaches to see if their speculation is correct or not. In the event that the exploration gives a positive result, then, there is a probability for the speculation to be created to a hypothesis, if not the specialists would need to make new suppositions and theory and proceed with the examination (Shamoo, 2009).



Carson, R., Darling, L., & Darling, L. (1962). Silent spring. Boston: Houghton Mifflin.

 2Cohen, Joel. How Many People Can the Earth Support? New York: W. W. Norton,


Pulliam, H.R., and N.M. Haddad. Human population growth and the carrying capactiy concept. Bulletin of the Ecological Society of America, 1994, 75: 141-157. 


3 Czech, B.  Shoveling Fuel for a Runaway Train: Errant Economists, Shameful

Spenders, and a Plan to Stop Them All. University of California Press, 2000, pgs 88-92.

J., Johnstone, N., Mejias, R., & Porras, I. (2000). The environmental effects of tax

differentiation by vehicle characteristics: Result from Costa Rica. London: Internat. Inst. for Environment and Development [u.a..

1 Nebel, B.J., and R.T. Wright.  Environmental Science: The Way the World Works.

Seventh Edition. Prentice Hall, New Jersey, 2000.

Shamoo, A. E. (2015). Responsible conduct of research.

Shamoo, A. E., &Resnik, D. B. (2009). Responsible conduct of research. New York, NY: Oxford University Press.

Wells, C. W. (2012). Car country: An environmental history. Seattle, Wash: University of Washington Press.

World Commission on Environment and Development. (1987). Our common future. Oxford: Oxford University Press.

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