If we focus on climate change as the problem, the key driver is accumulating CO2 emissions that keep pushing atmospheric concentrations higher.


"Cumulative emissions of CO2 largely determine global mean surface warming by the late 21st century and beyond. Projections of greenhouse gas emissions vary over a wide range, depending on both socio-economic development and climate policy."

~ IPCC (2014, p. 8)


CO2.Earth brings focus to the critical problem of 'rising CO2.'  It also situates this problem among a broader array global environmental problems.  This broader context is provided by content related to the Annual Greenhouse Gas Index, "The Great Acceleration" (see "The GA" tab on this page) and Planetary Boundaries.  Each problem appears to identify a problem in the relationship between humankind and the earth system.  Learning about the problems may offer an opportunity to improve our collective relationship with the earth. 

This "problem identification" sets out some of the dimensions of the climate and other global environmental problems. It offers a starting place to answer questions like these:

  • 'What problem or problems exist?
  • "What are the risks?
  • How do we know these things?