Some scientists argue that permanent, retrievable storage of toxic and hazardous wastes is preferable to burial. How can we be sure that material that will be dangerous for thousands of years will remain secure? If you were designing such a repository, how would you address this question?

The boiling point of water on a mountain top is less than on the ground.

At sea level, atmospheric pressure is 14.7 psia and water boils at 212℉ (100℃).

At an elevation of 8,000 feet (2,438 meters), water boils at 197℉ (91℃) and pressure is 10.9 psia.

At an elevation of 10,000 feet (3,048 meters), water boils at 193℉ (89.6℃) and pressure is 10.1 psia.