Passage Summary: A geologist warns that we shouldn't bury nuclear waste under a mountain without checking for cracks first, because those cracks could cause a leak that lasts for millennia.

Conclusion: A nuclear waste facility should not be built under the mountain until scientists confirm there are no geological faults.

Reasoning: Faults could lead to dangerous leaks, and the waste remains hazardous for 25,000 years, making any seepage a disaster.

Analysis: The geologist is making a recommendation based on a potential risk. To strengthen this, we should look for information that makes the risk more likely or the investigation more necessary. Perhaps there is evidence that this specific mountain range is prone to such faults, or that current technology is capable of detecting them effectively. Any information that bridges the gap between 'there might be a fault' and 'we definitely need to check' will help.