The first advantage of forests is that they play a huge important role in the purification of the very air that we breathe as humans. As you probably already know, the conversion of oxygen into carbon dioxide (which happens inside our body) is known as respiration. The carbon dioxide that we breath out is absorbed by the trees and plants who then convert it back to oxygen in a process called photosynthesis.
Secondly, plants and trees also provide us with a lot of important ingredients for many modern day medicines that we just take for granted. Essential amount of ingredients for medicines are taken from tropical plants, as well as possible hundreds of others that we are yet to discover. These unknown substances could even provide us with cures for diseases, such as cancer.
Forests are also important for balancing our climate in general. Plants and forests help to enrich our soil by recycling nutrients that are obtained from dead leaves and small animals on the forest floor.
They also help to regulate our water cycle by absorbing and redistributing rainwater equally to all species on the planet. This process is more commonly known as the economy of water. Tropical rainforests actually contain around 90 per cent of the planet's species which makes the biggest rainforests of the world.