Plate tectonics,millions of years of the earth being pushed up by earthquakes
Answer:
Orbit.
Explanation:
After the discovery of Uranus, scientists were having trouble figuring out the planet's orbit. They realized that there must be another planet farther out than Uranus.
American consumption, although it leads to many things both "good" and "bad" tends to "deplete many natural resources". It also tends to have negative effects on the environment.
