In this new 2021 high-definition program, learn all about trees and their role in the ecosystem. How much oxygen does an average-sized tree produce? What does the root system of a tree provide for the tree? What are the differences between deciduous and coniferous trees? What are the parts of a tree? How does a tree turn air, water and sunlight into food? How does a tree turn air, water and sunlight into food? What does new research reveal about how trees communicate and help one another?