SimCenter

Sustainability definitions and metrics from various sources:

• EPA definition of sustainability
  Sustainability creates and maintains the conditions under which humans and nature can exist in productive harmony, that permit fulfilling the social, economic and other requirements of present and future generations.
  http://www.epa.gov/sustainability/basicinfo.htm
   
• World Population
  projected to 2050 in both developed and developing countries
  http://blog.world-mysteries.com/science/the-world-population/
   
• Human carrying capacity
  When discussing human populations, the carrying capacity often refers to the number of number of individuals that the Earth could hold at different standards of living and levels of resource consumption.
  http://www.eoearth.org/article/Carrying_capacity

• Ecological Footprint Analysis and global hectare Definition, and graphs
  The Ecological Footprint is defined as "the area of productive land and water ecosystems required to produce the resources that the population consumes and assimilate the wastes that the population produces, wherever on Earth the land and water is located."

  The total “footprint” for a designated population’s activities is measured in terms of ‘global hectares.’ A global hectare (acre) is one hectare (2.47 acres) of biologically productive space with an annual productivity equal to the world average. Currently, the biosphere has approximately 11.2 billion hectares of biologically productive space corresponding to roughly one quarter of the planet’s surface.
  http://www.sustainablescale.org/conceptualframework/understandingscale/measuringscale/ecologicalfootprint.aspx

• Ecological Footprint Graph
  Per Capita footprint for both high income areas and low income areas
  Energy Consumption
  Footprint by region and population size
  What is used to measure ecological footprint
  http://www.footprintnetwork.org/en/index.php/GFn/page/footprint_basics_overview/

• Keeling Curve
  http://planetforlife.com/co2history/index.html

• Current Global Carbon Dioxide levels and where we need to be
  http://www.350.org/sites/all/files/chart.png

• World Game Statement
  www.Geni.org

• Our Common Future:  Definition of Sustainability
  http://en.wikipedia.org/wiki/Our_Common_Future

• Most Sustainable Companies
  http://sustainabilityadvantage.com/2011/04/05/5-lists-of-the-most-sustainable-companies/
   
• Sustainable Cities Network
  http://www.sustainablecitiesnet.com
   
• Sustainable indicators
  http://www.sustainablemeasures.com/indicators
   
• SDRSP Metrics Task Force — Community Sustainability Metrics List
  http://www.wrsc.org/documents?term_category=703&term_scale=All&number_stars=&term_created=&term_created=&number_stars=&sortoptions=rating
   
• Articles on Sustainability Metrics
  http://scholar.google.com/scholar?q=sustainability+metrics&hl=en&as_sdt=0&as_vis=1&oi=scholart
   
• Ecological Footprint
  http://www.cambridgenow.ca/newsarchives/archivedetails.cfm?id=2163