ENSVTY 101, fall 17 Exam 3·green 3/5 \"Methane time bombs\" is a phrase associat
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ENSVTY 101, fall 17 Exam 3·green 3/5 "Methane time bombs" is a phrase associated with 48. a methane released from permafrost b. methane released by cattle e. methane released by decaying manure d. methane released from sewage treatment plants 49. In a warmer world, which of the following organisms are likely to decline in numbers a. insects b, microbes c. humans d. fungi and molds 50. Although temperatures have fluctuated throughout the carth's history. scientists are greatly concermed about the current warming because a. clouds are not reflecting as much radiation now as in the past b. it is occurring at a more rapid rate than in the past c, the ozone hole is allowing more radiation to enter the atmosphere d. wildfires are more sever and occur with greater frequency 51. The tipping point for CO; levels is 450 ppm; : this means that a. if CO; levels fall below 450 ppm there could be long-term potentially catastrophic effects b. CO; levels above 450 ppm will cause long-term potentially catastrophic effects c. CO: levels above 450 ppm will cause irreversible changse d·CO2 levels below 450 ppm will cause irreversible change 52. Which country has withdrawn from the 2015 Paris Agreement on Climate Change? d. Japan a. Netherlands 53, Which of the following countries intends to become the first carbon neutral country by cutting its net a. Costa Rica 54. b. Turkey c. United States carbon emissions to zero by 2030? b. Canada c. Mexico d. Spain Geoengineering methods to control global warming are criticized because a. they don't go far enough in reducing CO; levels b. they are vulnerable to cheating c. taxes on energy consumption are not popular d. the results are unpredictable and could have negative impacts on the climate and atmosphere 55, Governments can promote solutions to climate disruption by a. strictly regulating water vapor and sulfur dioxide as air pollutants b. placing a cap on total human-generated carbon dioxide and methane emissions c. increasing taxes on businesses that encourage energy efficient technologies d. curbing economic growth 56. The world needs to cut its greenhouse gas emissions by a. 5-15% in order to prevent the planet heating up by more than 3.6 degrees Fahrenheit by the year 2050 b. I 5-25% C. 50-85% d.100% 57. Which is a statement made by Dr. Seitter? a. Humans are blamed too much as a cause of climate change. b. Anyone who says climate change is not happening is either in denial or lying. c. We can geo-engineer our way out of the problems of climate changse d. all of the above 58. The "No-Regrets Strategy" calls forExplanation / Answer
48. a. methane release from permafrost. the release of methane from soils in permafrost regions of the Arctic.
49. humans. This is because there would be less resources available for the human survival.
50. ozone hole is allowing more radiation to enter into the earth atmosphere. Due to greenhouse effect the depletion of ozone layer is taking place which is the cause of global warming.
51. CO2 levels above 450 ppm will cause irreversible change. Tipping point is a concept of a point when global climate changes from one stable state to another stable state.
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