Deforestation is when trees are burned or cut down, for their timber or for the land they are on. This causes less amounts of oxygen in the atmosphere, which is essential for organisms.
Some environmental effects of deforestation are desert like conditions, flooding, increased Carbon Dioxide Levels, and ultimately covering the planet in water because the ground can't absorb the water without trees.
To prevent from this from ever happening you can recycle, plant more trees and protect forests from illegal activities.
To prevent from this from ever happening you can recycle, plant more trees and protect forests from illegal activities.