Which of the following statements about the greenhouse effect is false?

• The amount of heat trapped in the troposphere depends on concentrations of greenhouse gases.
• The greenhouse effect is a new theory that explains the warming of the atmosphere.
• Heat trapped by greenhouse gases keeps the planet warm enough for life.
• The predominant greenhouse gases are water vapor, carbon dioxide, methane, and nitrous oxide.
  The predominant greenhouse gases are water vapor, carbon dioxide, methane, and nitrous oxide.

Over an extended period of time, the United States has been responsible for the majority of global CO2 emissions, at 25% of the total for all countries. In 2008, the largest emitter was

• United States
• Japan
• China 
• Russia

Increased levels of carbon dioxide in the atmosphere have been implicated in which of the following?

• Increased global warming
• Increased seawater acidity
• decreased seawater temperatures
• both increased global warming and increased seawater acidity

Which of the following would make a greater contribution to rising sea levels?

• melting sea ice
• melting land-based ice
• increased levels of precipitation in some areas
• increased levels of atmospheric water vapor

A warmer world is least likely to result in

• decreased food production
• reductions in biodiversity
• a rise in sea level
• more moderate weather

In a warmer world, we would expect more

• droughts
• hurricanes
• desert expansions
• all of these

A loss of 15% of ____________________ would cause a one meter rise in sea level that would threaten millions of people and cause trillions of dollar of damage to coastal areas.

• the Antarctic ice sheet
• inland glaciers in Alaska
• Greenland's ice sheet
• Iceland's ice sheet

The threat of global warming can be addressed by

• using energy more efficiently
• reducing deforestation
• slowing population growth
• shifting to renewable resources

The Kyoto treaty to reduce global warming

• does not require developing countries to make any cuts in their greenhouse gas emissions
• went into effect in 2005
• was not supported by the U.S. after 2001
• all of these answers

President Barack Obama wants the United States to

• lead the way in creating a new international agreement on climate change
• reduce our carbon emissions to 1990 levels by 2020
• lead the way in creating a new international agreement on climate change and reduce our carbon emissions to 1990 levels by 2020
• all of these answers