The world has lost nearly half its forested area in the past 8,000 years, and the majority of that loss occurred in the 20th century, when cultivated area expanded rapidly and consumption of wood and paper jumped dramatically. Worldwatch research documents forests' value as providers of goods and natural services, such as erosion prevention and flood control. It offers a vision of the sustainable use of forests, and is currently focused on the role of illegal logging in deforestation, and on the critical issue of forest restoration.

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