climate change

What is the main cause of the unusually fast rise in the planet's temperature in the last century?

• Volcanic activity

• Solar radiation

• Natural climate fluctuation

• Burning of fossil fuels

What is the process known as the greenhouse effect?

• Trapping of heat near the earth by greenhouse gases

• Absorption of solar energy by the earth

• Formation of Arctic sea ice

• Radiation of energy back into space

What evidence supports the occurrence of global warming?

• All of the above

• High levels of greenhouse gases in ice cores

• Decrease in Arctic sea ice

• Recent string of very warm years

According to NASA studies, how much has the extent of Arctic sea ice declined in the last 30 years?

• 5 percent

• 10 percent

• 20 percent

• 15 percent

What do some climate models predict as a result of rising temperatures?

• More frequent hurricanes

• Rising sea levels

• Subtle changes

• All of the above

What do many organizations advocate to reduce the impact of global warming?

• Increase in fossil fuel consumption

• Cutting greenhouse gas emissions

• Use of compact fluorescent light bulbs

• Driving more miles in the car