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Total forest cover, in million hectares (ha). Data from: Earth Policy Institute, and by the Food and Agriculture Organization of the United Nations (FAO), Global Forest Resources Assessment 2005 (FRA 2005). |
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| CO2 Level | Forest Cover | Desertification | GDP | Sea Life | Population | ||||||
| 2009 | 1.72 | 2009 | 3,952 | 2009 | 12.1 | 2008 | 60,587,016 | 2009 | 75% | 2010 | 1.10 |
| 2008 | 1.66 | 2008 | 3,989 | 2008 | 12.0 | 2007 | 54,347,038 | 2008 | 69% | 1990 | 1.11 |
| 2007 | 2.12 | 2007 | 4,077 | 2006 | 48,244,879 | 2007 | 1980 | 1.13 | |||
| Moves Toward Sustainable As Numbers Go DOWN | Moves Toward Collapse As Numbers Go UP | ||||||||||
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A continual increase of any one criterion may cause a catastrophic collapse of civilization. |
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| Meter | Forest Cover | ||||||||||