Describe the international efforts that are currently in place to protect our ozone shield? What evidence is there that such efforts have been effective?
What will be an ideal response?
The Montreal Protocol, signed by 194 countries, has been a significant stride forward in the protection of ozone. CFCs have been reduced to the point that they are barely produced at all anymore. "The results of the protocol can be seen clearly in Figure 19-31, which shows the time course of the production of ozone-depleting chemicals and the abundance of those chemicals in the stratosphere."
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Use the wind chill chart in Figure 7.1 to determine the wind chill temperature for each of the following examples:
a) Wind speed: 24 kmph, air temperature: 234°C 5 wind-chill temp: b) Wind speed: 48 kmph, air temperature: 27°C 5 wind-chill temp: c) Wind speed: 8 kmph, air temperature: 1 4°C 5 wind-chill temp: d) Wind speed: 56 kmph, air temperature: 223°C 5 wind-chill temp:
Which step would be most likely to have the greatest effect on improving outdoor air pollution?
A) drastic reduction in the use of aerosol cans B) drastic reduction in cigarette smoking C) drastic reduction in radon emissions D) significant reduction in automobile use E) drastic reduction in burning firewood
The sulfide mineral group includes many valuable ores.
Answer the following statement true (T) or false (F)
Landslides and mudslides are examples of
A. mass wasting and geologic processes in which materials are moved downslope by force of gravity. B. geologic processes that only occur after volcanic eruptions. C. mass wasting. D. geologic processes in which materials are moved downslope by force of gravity.