Which of the following exhaust gas emissions...

🔍 Key Concepts

• Greenhouse gas "potency" is usually measured by global warming potential (GWP), not just by how much of it is emitted. • Compare typical exhaust components from LNG (liquefied natural gas) fueled engines versus conventional diesel: which gas is especially associated with natural gas systems? • Understand that some gases can be present in small quantities but still have a much higher warming effect per molecule than CO2.

💭 Think About

• Among the choices, which substance is most directly related to natural gas (LNG) composition itself? • Which of these gases is widely discussed in climate science as having a significantly higher global warming potential than CO2 over a 20-year or 100-year period? • Are any of these options primarily known for toxicity/odor rather than for being a major greenhouse gas in climate reports?

✅ Before You Answer

• Identify which listed gas is the main component of natural gas (LNG). • Recall which gas IPCC reports often describe as having a much higher GWP than CO2. • Eliminate options that are mainly known as toxic or smelly trace gases rather than key greenhouse gases in engine emission discussions.

Which of the following exhaust gas emissions from an LNG fueled diesel engine is the most potent greenhouse gas?

Hydrogen sulfide

Methane

Methyl mercaptan

CO2

🔍 Key Concepts

💭 Think About

✅ Before You Answer