QUESTION5 What do CFCs (chlorofluoroc arbons) react with in the lower atmosphere

Question

QUESTION5 What do CFCs (chlorofluoroc arbons) react with in the lower atmosphere and the earth's surface? o a bromine b.chlorine Oc. ozone o d nothing O e methane QUESTION 6 Which of the following five factors, responsible for large-scale temperature changes presently being experienced, has changed decisively due to human activity? o a stratospheric volc anic sulfate aerosols o b. greenhouse gases o c. solar radiation o d. climate variability e position of the continents and oceans QUESTION 7 Which gas is responsible for most of the greenhouse effect? a water vapor o b. nitrous oxides O c. carbon dioxide d chilcrofluoroc arbons (CFCs) e methane QUESTION 8 Which of the following statements is most correct concerming global warming? a curtailing our CO2 emissions wil plunge us into another ice age b planetary temperatures have been declining over the last 10. 000 years c the planet is experiencing a long-term natural warming trend exacerbated by human activities d anthropogenic warming has dwarfed natural

Explanation / Answer

5. CFC reacts with chlorine in the lower atmosphere and the earth's surface.

(CFCs contain a chlorine, fluorine, and carbon atoms that are bound together. CFCs are stable in lower atmosphere)

6. Green house gas is responsible for global temperature changes due to human activities.

7. Water vapour is responsible most for global warming.

But there are some debate within different scientists. The two main gases responsible for the greenhouse effect (and not noly its recent increase) are water vapour and carbon dioxide. I think water vapour is most responsible for global warming.

8. The planet is experiencing a long term natural warning trend exacerbated by human activities.

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