Harm me not. Excellent advice.
When we cut the trees down, we lose the top soil, which takes out the ground cover. The Earth is then unprotected and runoff is magnified one-hundred times. Hence, the terrible mud slides in California and flooding in many areas of the USA.
If you live in a forested area, make sure that controlled burns take care of scrub. Maintain a perimeter and keep trees away from your home. You can save your home from a forest fire if you have planned for it.