Inorganic compounds are usually held together by bonds.
ionic
covalent

Inorganic substances are usually held together by ionic bonds. Inorganic substances are substances that does not possess carbon atoms. They are made up of other elements and the chemical with which they operate is usually ionic [electrovalent] bond. Organic substances on the other hands possess carbon atoms as thie backbone. They are found in large quantities in living organisms.

Humans can affect weathering and erosion in several ways.  humans cause  increases in acid rain and pollution, which increase the amount of  weathering  agents in the air and water, and then on land.for an easy answer: 1) acid rain2) pollution