1.
- Soil: crop rotation, fewer concrete surfaces, plant trees to secure topsoil
2. Advantages
- coal: easy to burn, inexpensive
- Oil: easily available, used in a variety of industries
- Natural gas: Easy to store, cheap
3. Disadvantages:
- Coal: Produces large amount of CO2, fast depleting as we consume so much of it
- Oil: releases greenhouse gases, water pollution
- Natural gas: highly flammable, release greenhouse gases
In 1846, the planet Neptune was discovered after its existence was predicted because of discrepancies between calculations and data for the planet Uranus. Astronomers found the new planet almost exactly at the position predicted by the calculations of Urbain Jean Leverrier.
The CRUST is made up of all the earth's land and ocean floors
