Let's think step by step! Of the below sentences, which one does *not* make sense?
Options:
- Sentence A: "Car exhaust has no adverse effect on the atmosphere."
- Sentence B: "Car exhaust is harmful to the atmosphere."

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Car exhaust releases toxic fumes into the atmosphere. The answer: Sentence A.