This is a question that invokes my passion because I am an advocate for nature, I'm an environmentalist and its always a bother to me when people live their lives destroying that which protects them.
Forests plays vital roles in our lives that a lot of people are not aware of.
First, forest helps to prevent desert encroachment. Without the forest trees, the harmful effects of UV radiations will kill plants and dry out lands such that there'd be no more arable lands. Which would mean the death of the human race.
Another thing is that forest trees helps in carbon sequestration. Without the forest trees to trap excess carbon. the amount of carbon dioxide in the atmosphere will greatly increase if the trees weren't present. Let's remember that Carbon dioxide is a green house gas, its concentration in the atmosphere could lead to global warming. What forest trees does for us is enormous in these regards. They couldn't trap carbon in the atmosphere for years and are not released till someone cuts them down an burn them.
Also, forest trees acts as water sheds. They help to collect raindrops and slows their fall to the surface of the earth, the forest floor. This greatly reduces precipitation and its resultant effect.
Forest tress act as wind break. Imagine a wind coming with a full force unhindered. It could destroy houses, farm lands and even lives. These trees helps prevent that.
These and lots more are some of the functions that these trees does for us. What I've written here are only about treesa and their effect on humans. There are other functions, apart from trees, that forests provides.
We cannot simply live without these works of creation. Lets do all to ensure their sustainability.
Another great article! KEEP IT UP!