¿Que condiciones orillan a una persona a cambiar de lugar para vivir?

Witch layer of the atmosphere has the most air pressure

What happens to rock when acid reacts with it?

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed