CCA Climate Science & GHG Fundamentals

Question 1

Which greenhouse gas has the highest global warming potential (GWP) over a 100-year timeframe among those covered by the Kyoto Protocol?

Accepted Answer

Sulfur hexafluoride (SF6)

Answer

SF6 has a 100-year GWP of approximately 23,500, making it the most potent greenhouse gas covered under the Kyoto Protocol.

Question 2

What does the term 'CO2 equivalent (CO2e)' allow carbon auditors to do?

Accepted Answer

Express emissions from different GHGs on a common scale based on their warming potential

Answer

CO2e converts the warming impact of various greenhouse gases into the equivalent amount of CO2 that would cause the same warming, enabling a unified measurement.

Question 3

According to the IPCC, what is the primary driver of observed climate change since the mid-20th century?

Accepted Answer

Human-caused greenhouse gas emissions

Answer

The IPCC's Sixth Assessment Report concludes with high confidence that human-caused GHG emissions are the dominant cause of observed global warming since the mid-20th century.

Question 4

The '1.5°C target' referenced in the Paris Agreement refers to limiting global average temperature rise above:

Accepted Answer

Pre-industrial levels

Answer

The Paris Agreement aims to limit global average temperature increase to 1.5°C above pre-industrial levels to avoid the most severe climate impacts.

Question 5

Which of the following is a short-lived climate pollutant (SLCP) with a 100-year GWP approximately 28 times that of CO2?

Accepted Answer

Methane (CH4)

Answer

Methane has a 100-year GWP of approximately 28–34 (AR6), making it a potent but relatively short-lived climate forcer compared to CO2.

CCA - Certified Carbon Auditor Practice Test

CCA - Certified Carbon Auditor Practice Test

CCA Climate Science & GHG Fundamentals