When does pullution occur ... ?

Answer:Some of the main causes of pollution include industrial emissions, poor disposal of wastes, mining, deforestation, use of fossil fuels and agricultural activities. Pollution can affect the air, the land and water bodies throughout the world ... Both industries and individual human beings contribute to this cause.

Explanation: Air pollution occurs when things that aren't normally there are added to the air. A common type of air pollution happens when people release particles into the air from burning fuels ... These can take part in further chemical reactions once they are in the atmosphere, creating acid rain and smog.

Answer: when trash is in the wrong spot

Explanation:

Animals might die by eating the trash. Pollution can harm environments as well.