What is meant by the term positive feedback? What role could positive feedback play in the atmospheric greenhouse effect? Would this enhance or reduce global warming? What is an example of a "negative feedback" mechanism?
What will be an ideal response?
Answers may vary.
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The Intergovernmental Panel on Climate Change (IPCC) is an international organization of the United Nations
A. that concludes that increased carbon dioxide is involved in increasing the temperature. B. that concludes human activity is affecting climate. C. that concludes the Earth is warming. D. All statements are correct.
Which of the following statements is true regarding genetically modified (GM) crops?
A) Latin America leads the world in land area dedicated to GM crops. B) The United States leads the world in land area dedicated to GM crops. C) GM crops are widely favored by environmentalists. D) Europe leads the world in land area dedicated to GM crops.
Urban heat islands
A) results in cities being cooler at night, compared to nearby rural areas. B) cause a wind to flow from the city to the country at night. C) release more longwave radiation in the day than a comparable area of nearby rural land. D) have less evaporative cooling than nearby rural areas. E) all of the above
Cirrus uncinus clouds are often precursors of:
A) bad weather. B) clear skies. C) calm conditions. D) lenticular clouds.