US National Climate Assessment Ch. 2

Which greenhouse gas has the highest atmospheric concentration increase since 1850?

• Methane (CH4)

• Carbon Dioxide (CO2)

• Nitrous Oxide (N2O)

• Sulfur Dioxide (SO2)

How much has the global average temperature increased since the late 1800s?

• 1°F

• 2°F

• 3°F

• 4°F

How often does the U.S. experience a billion-dollar weather disaster today compared to the 1980s?

• Every year vs. every decade

• Every three weeks vs. every four months

• Every month vs. every year

• Every day vs. every week

Which region in the U.S. has experienced the fastest warming since 1970?

• Southeast

• Southwest

• Alaska

• Midwest

Which group is at the highest risk of heat-related deaths in the U.S.?

• Children under 10

• Americans over 65

• People living in rural areas

• College students

What percentage of global warming is attributed to U.S. emissions from 1850 to 2021?

• 6%

• 10%

• 17%

• 23%

What has reduced U.S. aerosol pollution significantly in recent decades?

• Electric vehicles

• Reduced industrial production

• Climate change policies

• The Clean Air Act

What is the primary effect of aerosols on climate?

• Increase heat absorption

• Cause volcanic eruptions

• Increase heat absorption

• Scattering sunlight

Which of these common gases found in our atmosphere is NOT a greenhouse gas?

• Nitrogen (N₂)

• Ozone (O₃)

• Nitrous oxide (N₂O)

• Methane (CH₄)

What type of radiation does Earth primarily emit?

• Ultraviolet

• Visible light

• Microwave radiation

• Infrared radiation