Understanding GHG Emissions Trends

What is the primary cause of the warming of Earth's climate since the 1800s according to the scientific consensus?

• Natural forces

• Human activity

• Solar radiation

• Volcanic eruptions

Which greenhouse gas is responsible for amplifying the warming potential of CO2?

• Methane

• Nitrous oxide

• Water vapour

• Ozone

What percentage of all anthropogenic greenhouse gas emissions is made up by CO2?

• 50%

• 60%

• 75%

• 85%

What was the approximate atmospheric CO2 level in the late 1950s?

• 280 ppm

• 316 ppm

• 350 ppm

• 420 ppm

By how much has the atmospheric CO2 level increased from the 1800s to today?

• 40 ppm

• 100 ppm

• 140 ppm

• 200 ppm

What percentage of the warming from the 19th to the 21st century is accounted for by CO2?

• 50%

• 60%

• 70%

• 80%

Which of the following is NOT a principal greenhouse gas?

• Methane

• Nitrous oxide

• Argon

• Water vapour

What is the scientific consensus on the role of natural forces in the current rate and scale of climate change?

• Natural forces are the primary cause

• Natural forces alone cannot account for the changes

• Natural forces have no impact

• Natural forces are more significant than human activity

Which gas is primarily responsible for the greenhouse effect by absorbing longwave radiation?

• Oxygen

• Nitrogen

• Carbon dioxide

• Helium

What is the current approximate atmospheric CO2 level?

• 280 ppm

• 316 ppm

• 380 ppm

• 420 ppm