In order for communities to expand, people have to clear land which includes cutting down trees. This can harm local wildlife and is a leading cause of extinction of animals.
Do you know what factory farming is?
It's the primary way that animals are raised for consumption by humans. Instead of having animals roaming in pastures, animals are kept close together in big buildings.
This makes the animals lives very unhappy and it degrades our land and our environment.
When you throw something away in the garbage, it eventually ends up in a landfill. Did you know that landfills produce methane?
Methane is a greenhouse gas!