Submitted:
Jun 23, 2009 - 7:37 am (Edited Jul 31, 2012 - 2:08 pm)
Facts/Notes:
Carbon dioxide, or CO2, is a naturally occurring greenhouse gas that is also released into the atmosphere by the burning of fossil fuels, for example in cars and power plants (causes of global warming). June 2012 marks the 4th warmest June globally since temperature records began in 1880. June 2010 marks the 1st warmest.