Landsat Satellite Data Used to Inventory the World's Forests

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A new study based on Landsat Earth-observing satellite data comprehensively describes changes in the world's forests from the beginning of this century.

Published in Science today, the study found that from 2000 to 2012 global forests experienced a loss of 888,000 square miles (2.3 million square kilometers), roughly the land area of the U.S. states east of the Mississippi River. During the study period, global forests also gained an area of 309,000 square miles (800,000 square kilometers), approximately the combined land area of Texas and Louisiana.
"Tracking changes in the world's forests is critical because forests have direct impacts on local and national economies, on climate and local weather, and on wildlife and clean water," said Anne Castle, Assistant Secretary of the Interior for Water and Science. "This fresh view of recent changes in the world's forests is thorough, objective, visually compelling, and vitally important."