Exam 21: Climate Change and Ozone Loss

____________________ is formed naturally in the upper stratosphere by short wavelength ultraviolet radiation.

Which of the following are scientists uncertain about? 

Which of the following does NOT use CFCs in its production? 

CO₂ -According to the graph,as the temperature decreased 120 000 years ago,what happened to the carbon dioxide concentration?

Which of the following illustrates the discovery of the effects of CFCs and the political response to that knowledge? 

The country that is the largest greenhouse gas emitter is ______________________________.

The effects of ____________________ depletion on wildlife include increased incidence of eye cataracts and reduced populations of aquatic species.

Which greenhouse gas has NOT increased in recent decades? 

In the stratosphere,ambient temperature increases with altitude due to the absorption of UV light by oxygen and ozone.

What is the source of the greatest uncertainty in current climate models? 

What has the Earth's average surface temperature been for the past 900 000 years? 

Scientists believe that rising levels of greenhouse gases in the atmosphere are contributing to global warming,but cannot discern to what extent and with what ramifications.

What would likely occur in a warmer world? 

The world's economies are not affected by the effects of climate change.

Rising sea levels,increasing cloud cover,and air pollution will decrease climate change.

Which of the following is NOT a major greenhouse gas? 

On what factor does correspondence between climate models and the real world depend? 

CFCs are released into the atmosphere by spray cans,discarded refrigerators,and leaky air conditioners.

What would result if warming occurs in the Arctic?