Another example is flying in an airplane. The air in the plane is pressurized to somewhat match sea level pressure. The plane has metal walls and two sets of windows to handle the pressure difference. Mountains and volcanoes crumble into dirt that feed plants because rain or snow fill little cracks in the rock. When the water freezes, the ice expands and cracks the rock.
Plants have a hard time eating rocks, but they really like to wiggle their roots through the dirt.