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GEO-3: GLOBAL ENVIRONMENT OUTLOOK  
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UNEP Website GEO Home Page
Global number and area of protected sites by year

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Total area of protected areas has increased from some 2.78 million km2 in 1970 to more than 12 million km2 by 2000

Note: areas of more than 1 000 ha, IUCN categories I-VI

Source: compiled from Green and Paine 1997 and UNEP-WCMC 2001b

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