3. How does the age of crust change as you move further away from an ocean ridge?

Explanation:

Oceanic crust slowly moves away from mid-ocean ridges and sites of seafloor spreading. As it moves, it becomes cooler, more dense, and more thick. Eventually, older oceanic crust encounters a tectonic boundary with continental crust.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint