It's pretty tough to describe all the things trees do for our environment. The shade that trees give can cool the surrounding area by almost 10 degrees. Their root systems hold together the forest floor and filter our drinking water. The trees themselves pull in carbon dioxide that we exhale, and produce the oxygen we inhale—air, clean air, that we all need to breathe. The forest provides habitat for thousands of different creatures, including a number of endangered species. Each does its part to continue the forest life cycle. Forestry professionals understand the complexity of ecosystems. Maintaining a healthy environment while providing wood products is the most important part of their job.