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Revisión actual del 18:44 14 jul 2011
VITAL SIGNS, WORLDWATCH INSTITUTE
Vital Signs 2002 provides comprehensive, user-friendly information on key trends. Using tables and graphs readers can assess the developments that are changing their lives for better or for worse.
The 2002 edition features more than 50 key indicators of long-term trends—from the growth of fish farms and bicycle production to the increase in solar cell and Internet use.