Use:  	  get the weekly average 
	  concentration of CO2 
	  in the atmosphere

Source:   Earth System Research 
	  Laboratory (NOAA)

Units:    parts per million (ppm)

Format:   text/plain

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Parameters: 0	  latest weekly 
	  	  average (default 
		  output)

 	    1	  weekly average 
		  1 year ago

	    10    weekly average 
		  10 years ago

            all   human-readable 
		  summary of all 
 		  of the above 

  	    help  this help page

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Example: www.hqcasanova.com/co2/1 
	 gives "395.51 ppm"