CO2 Emissions and Atmospheric Concentrations

What is the current average growth rate of CO2 emissions per year?

• 3%

• 1.5%

• 2%

• 0.6%

What was the record high of carbon released by human activities in 2024?

• 8.5 gigatonnes

• 11.0 gigatonnes

• 9.7 gigatonnes

• 10.2 gigatonnes

What was the atmospheric CO2 concentration in 2024?

• 400 ppm

• 424 ppm

• 410 ppm

• 430 ppm

What is the main reason for the rapid increase in CO2 concentrations?

• Increased deforestation

• Natural carbon sinks struggling

• Increased volcanic activity

• Decreased fossil fuel use

Where is the Kennaook/Cape Grim Baseline Air Pollution Station located?

• Victoria

• New Zealand

• Tasmania

• Queensland

What analogy is used to describe CO2 emissions and concentrations?

• A fire and smoke

• A tap and a bathtub

• A wind and a sail

• A river and a dam

What are natural carbon sinks?

• Vehicles

• Oceans, plants, and soils

• Power plants

• Factories

What event likely contributed to the CO2 concentration jump in 2024?

• Volcanic eruptions

• Increased industrial activity

• Wildfires in Canada and South America

• Increased solar activity

What environmental condition affects the speed of carbon sinks?

• Humidity

• Temperature

• Environmental conditions

• Wind speed

What was the concentration of CO2 more than two million years ago?

• Exactly 350 ppm

• Above 400 ppm

• Below 300 ppm

• Around 450 ppm