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ashford sci207 quiz 4

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Question;1. Question;Life-cycle cost is the sum of;all recurring and one-time (non-recurring) costs over the full life span of a;good, service, structure, or system. Question 2. Question;The greenhouse effect is;caused by the burning of fossil fuels and deforestation. Points Received: 1 of 1 Comments: Question 3. Question;Which statement is true;regarding the policies to promote new renewables discussed in your text? Student Answer: A fee on carbon emissions would reward;renewable, clean energy sources over those that harm the economy and the environment.;Market-based schemes aimed at reducing carbon;emissions would give energy companies financial incentives to develop renewable;energy sources. Over 20 states have adopted standards that;set minimum requirements for the fraction of energy that must be supplied with;renewable sources. Sweden intends to utilize policies to;entirely eliminate their use of fossil fuels. All of the above statements are true. Instructor Explanation: The answer can be found in Section 8.1 of your;text. Points Received: 1 of 1 Comments: Question 4. Question;What is the central difference;between climate and weather discussed in your text?: There is no scientific difference between;climate and weather, and, as such the terms, may be used interchangeably. Climate is the average weather over a long;period of time while weather refers to the short term conditions. Weather is the average climate over a long;period of time while climate refers to the short term conditions. Climate refers to conditions in a specific;region of the world while weather refers to the global climate. None of the above are differences between;climate and weather. Instructor Explanation: The answer can be found in Section 7.2 of your;text. Points Received: 1 of 1 Comments: Question 5. Question;Which statement is not true;regarding hydroelectric power?: Hydropower can play a large part in reducing;greenhouse gas emissions since it does not require fuel to generate. The construction of dams to produce;hydropower can be extremely expensive and is often seen as a disadvantage of this;energy source. Hydropower is highly reliable and has been a;proven technology over time. Aside from the high investment costs for the;construction of dams, hydroelectric power has no ecological or environmental;disadvantages. All of the above statements are true. Instructor Explanation: The answer can be found in Section 8.2 of your;text. Points Received: 1 of 1 Comments: Question 6. Question;As discussed in your text, a;study by the Commonwealth Scientific and Industrial Research Organization;(CSIRO) concluded what about Australia?s climate?: As atmospheric carbon dioxide emissions have;risen, southern Australia has warmed by 1.6 ?F since 1950. Southern Australia has experienced, on average;15% less rain in the southern region since 1950. Estimations show that southern Australia will;be 4.4?F warmer by 2050 if current trends continue. If current trends continue, southern;Australia will experience diminished rainfall over time. All of the above statements are true. Instructor Explanation: The answer can be found in Section 7.5 of your;text. Points Received: 1 of 1 Comments: Question 7. Question;Net-zero energy refers to a;building or installation that produces less energy than it consumes, considered;to be energy reliant. Points Received: 1 of 1 Comments: Question 8. Question;Which statement is true;regarding nuclear energy?: Since 2005, global private investments in;nuclear energy totaled $100 million dollars. Nuclear plants cost 2-3 times as much as new;windpower to build. Nuclear energy currently produces 50% of the;U.S.?s energy needs. At least one nuclear reactor is currently;online in each of the 50 U.S. states. None of the above statements are true;regarding nuclear energy. Instructor Explanation: The answer can be found in Section 8.3 of your;text. Points Received: 1 of 1 Comments: Question 9. Question;Which statement is true;regarding the cost of climate change adaptation discussed in the text?: The costs of adapting to climate change have;been accurately calculated by a variety of governmental organizations. Based on the uncertainties surrounding;climate change, nobody is certain what climate change adaptation costs will be.;Climate change adaptation costs were;estimated by the UN Framework Convention on Climate at nearly $3 trillion;dollars over a ten year period. The World Bank estimates climate change;adaptation costs between $175 and $200 billion a year by 2030. All are true statements regarding climate;change adaptation. Instructor Explanation: The answer can be found in Section 7.3 of your;text. Points Received: 1 of 1 Comments: Question 10. Question;Which statement best;summarizes the world?s reaction to stratospheric ozone depletion discussed in;Chapter 7.4 of your text? Student Answer: The global scale of ozone depleting chemicals;makes the environmental problem of ozone depletion nearly impossible to solve. International cooperation led to a;significant decrease in ozone depleting chemicals that could allow natural;processes to heal the ozone layer within about 50 years. While initial efforts decreased ozone;depleting chemicals, in recent years, the reemergence of pollutants has led to;an expansion of the ozone hole. Through the Vienna Protocol, ozone depleting;chemicals were reduced by over 90% by 1998. None of the statements summarize the world?s;reaction to ozone depletion. Instructor Explanation: The answer can be found in Section 7.4 of your;text. Points Received: 1 of 1 Comments: * Times are displayed;in (GMT-07:00) Mountain Time (US & Canada);="msonormal">

 

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