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We derive our energy from a multitude of resources that have varying environmental challenges related to air and water pollution, land use, carbon dioxide emissions, resource extraction and supply, as well as related safety and health issues. Reprocessing spent fuel offers the advantages of higher energy efficiency and reduced spent fuel storage requirements with the disadvantage of higher risk of weapons proliferation through diversion of the reprocessed fuel stream.
Strong interest in renewable energy arose in the 1970s as a response to the shortage and high price of imported oil, which disrupted the orderly operation of the economies and societies of many developed countries. Today there are new motivations, including the realization that growing greenhouse gas emission accelerates global warming and threatens climate change, the growing dependence of many countries on foreign oil, and the economic drain of foreign oil payments that slow economic growth and job creation. There are three ultimate sources of all renewable and fossil energies: sunlight, the heat in the earth’s core and crust, and the gravitational pull of the moon and sun on the oceans. Renewable energies are relatively recently developed and typically operate at lower efficiencies than mature fossil technologies. Like early fossil technologies, however, renewables can be expected to improve their efficiency and lower their cost over time, promoting their economic competitiveness and widespread deployment. The future deployment of renewable energies depends on many factors, including the availability of suitable land, the technological cost of conversion to electricity or other uses, the costs of competing energy technologies, and the future need for energy.
- Which one of the following is not a renewable source of energy?
- Coal, oil, and natural gas are created _______ and contain the remains of__________.
- over millions of years; algae and plants
- over millions of years; dinosaurs and other animals
- over hundreds of years; algae and plants
- over hundreds of years; dinosaurs and other animals
- instantaneously; comet fragments
- Which one of the following is a consortium of oil-producing countries that hold a significant portion of the world’s oil reserves (and thus influence global oil prices)?
- About 44% of the electricity in the US is produced from _________. It produces about twice as much CO2 as an equivalent amount of _______.
- Burning natural gas; coal
- Hydropower; solar
- Natural gas; Geothermal
- Hydropower; geothermal
- Burning coal; natural gas
- Which one of the following is not true regarding nuclear power?
- Energy is captured from the radioactive decay of elements
- Nuclear power is considered an alternative fuel
- Radioactive wastes must be stored 2-5 years before disposal
- No CO2 is directly produced in nuclear power plants
- Nuclear power is used to produce electricity
- Which one of the following directly produces CO2 but is considered carbon neutral?
- The original source of energy that powers both wind energy and hydropower is…
- Rotation of the Earth
- The sun
- Radioactive decay within the Earth’s mantle
- Burning sawdust that is leftover from lumber production and using it to generate electricity would be an example of which one of the following?
- Municipal solid waste
- In the process of fracking, how is gas and oil extracted?
- Layers of earth are stripped away from the surface, exposing the fossil fuels
- Mining tunnels are created and the fossil fuels are extracted by teams working below ground
- Ocean sediments are mined and the fossil fuels are chemically extracted
- High-pressure fluids are injected underground to force out the fossil fuels
- Offshore drilling pads tap into pre-existing cracks in the Earth’s crust
- What fundamental similarity is shared between the following energy sources: biogas and municipal solid waste?
- Both burn waste to generate CO2, which itself is burned to create electricity
- Both chemically transform waste into oil
- Both trap the heat generated from decaying waste and use it to generate energy
- Both rely on the generation and combustion of methane
- Both produce no CO2
See Appendix for answers
EEA. (2013). Combined heat and power. Retrieved from www.eea.europa.eu/data-and-maps/indic ators/combined-heat-and-power-chp-1. Available under Creative Commons Attribution License 3.0 (CC BY 3.0). Modified from original.
Theis, T. & Tomkin, J. (Eds.). (2015). Sustainability: A comprehensive foundation. Retrieved from http://cnx.org/contents/1741effd-9cda-4b2b-a91e003[email protected] Available under Creative Commons Attribution 4.0 International License. (CC BY 4.0). Modified from original.
Page attribution: Essentials of Environmental Science by Kamala Doršner is licensed under CC BY 4.0. Modified from the original by Matthew R. Fisher. “Review Questions” is licensed under CC BY 4.0 by Matthew R. Fisher.
Science attempts to describe and understand the nature of the universe in whole or in part. Science has many fields those fields related to the physical world and its phenomena are considered natural sciences. A hypothesis is a tentative explanation for an observation. A scientific theory is a well-tested and consistently verified explanation for a set of observations or phenomena. A scientific law is a description, often in the form of a mathematical formula, of the behavior of an aspect of nature under certain circumstances. Two types of logical reasoning are used in science. Inductive reasoning uses results to produce general scientific principles. Deductive reasoning is a form of logical thinking that predicts results by applying general principles. The common thread throughout scientific research is the use of the scientific method. Scientists present their results in peer-reviewed scientific papers published in scientific journals. Science can be basic or applied. The main goal of basic science is to expand knowledge without any expectation of short-term practical application of that knowledge. The primary goal of applied research, however, is to solve practical problems.
Sustainability refers to three simple concerns: the need to arrest environmental degradation and ecological imbalance, the need not to impoverish future generations and the need for quality of life and equity between current generations. Added up, these core concerns are an unmistakable call for transformation. Business-as-usual is no longer an option. The concept of ethics involves standards of conduct. These standards help to distinguish between behavior that is considered right and that which is considered wrong. The ways in which humans interact with the land and its natural resources are determined by ethical attitudes and behaviors. A frontier ethic assumes that the earth has an unlimited supply of resources. Environmental ethic includes humans as part of the natural community rather than managers of it. Sustainable ethic assumes that the earth’s resources are not unlimited and that humans must use and conserve resources in a manner that allows their continued use in the future. Countries are categorized by a variety of methods. During the Cold War period, the United States government categorized countries according to each government’s ideology and capitalistic development. Current classification models utilize economic (and sometimes other) factors in their determination. Environmental justice is achieved when everyone enjoys the same degree of protection from environmental and health hazards and equal access to the decision-making process to have a healthy environment. Many problems face indigenous people, including: lack of human rights, exploitation of their traditional lands and themselves, and degradation of their culture. Despite the lofty U.N. goals, the rights and feelings of indigenous people are often ignored or minimized, even by supposedly culturally sensitive developed countries.
1. Scientific research that produces knowledge without any immediate practical use is specifically known as…
A. Basic science
B. Applied science
C. Hypothesis-based science
D. Descriptive science
E. Retrospective science
2. Which one of the following fulfills the definition of a hypothesis?
A. Removing invasive species will result in greater biodiversity.
B. Introducing invasive species will harm an ecosystem.
C. Invasive species are non-native species that alter ecosystems.
D. Introducing invasive species will decrease biodiversity by displacing native species
E. Ecosystem productivity will decrease when invasive species are introduced.
3. Which one of the following is consistent with the frontier ethic?
A. Expanding the area covered by a wildlife sanctuary
B. Protecting a natural area as a national park
C. Sustainable logging of a forest
D. Transferring ownership of forestland from private ownership to the federal government
E. Extracting copper ore from mineral-rich deposit in a landscape rich in biodiversity
4. Which one of the following suggests that when the effects of a human activity are poorly understood, we must presume that some level of harm may exist to the environment, and thus must proceed with that activity carefully?
A. Sustainability ethic
B. Precautionary principle
C. Environmental harm dictum
D. Environmental injustice
E. Presumptive principle
5. Which one of the following demonstrates the concept of the “tragedy of the commons”?
A. Competing companies log as many trees as possible for financial gain until no trees are left
B. Public forest land is sold to a privately-owned investor group
C. Logging forests is dangerous work and ends up killing or injuring many workers
D. A careless hiker accidentally starts a wildfire that destroys hundreds of acres of forest
E. Government regulations lead to conditions that increase the risk of forest fire on public lands
6. The equal sharing of Earth’s resources is specifically known as…
A. Environmental justice
C. Environmental equity
D. Ecological footprinting
7. John Muir’s position on the proposed development in the Hetch Hetchy Valley of California in the early 1900s would best match which one of the following?
A. Frontier ethic
B. Sustainable ethic
C. Land ethic
D. Ethos ethic
E. Darwinian ethic
8. Which one of the following is an example of inductive reasoning?
A. Every lion you’ve seen on TV hunts gazelles, therefore all lions hunt gazelles.
B. All tigers are mammals. All mammals are vertebrates. Therefore, tigers are vertebrates.
C. Every lake contains water therefore, Crater Lake contains water.
D. Only plants have flowers. Tulips are a plant because they have flowers.
E. The sun emits energy in the form of photons. Visible light is made of photos and thus light is a type of energy.
9. The fair treatment and meaningful involvement of all people regarding enforcement and implementation of environmental regulations and policies is known as what?
A. Quid pro quo
B. Environmental justice
C. Environmental equity
D. Habeas corpus
E. Ecologic inclusiveness
10. People and their culture that have existed continuously dating back to a time before their land was invaded or colonized by other societies are known as…
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Page attribution: Essentials of Environmental Science by Kamala Doršner is licensed under CC BY 4.0. “Review Questions” is licensed under CC BY 4.0 by Matthew R. Fisher.