g05.    How are forests of geological importance?

Forests control soil erosion, influence climate (50% to 80% of the moisture above tropical rainforests comes from transpiration and evaporation), and function as an integral part of the carbon cycle by controlling the abundance of CO₂. Forests also provide habitat for more wildlife species than any other biome, absorb air pollution, and produce O₂.

e01.    What is biodiversity?

e06.    What is “wilderness” and how much do we have?

e11.    What types of old-growth forests are there?

e14.    What are the basic components of life?

e17.    How do organisms use matter?

e23.    How is soil important to plants?

m02.    Are there other threats to forests?

m03.    How can the forests, as resources, be sustained?

m04.    How are National Forests managed?

m12.    Why are organisms becoming extinct?

m16.    How are forests of commercial importance?

m21.    Why is there controversy over old-growth deforestation?