\( \text{CO}_2 \) Emissions for Cities (2015)
      
         
         
         
         
      
     
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      Legend
      Blue: Lower \( \text{CO}_2 \) emissions per capita.  
      Red: Higher \( \text{CO}_2 \) emissions per capita. 
      The taller the building the more total \( \text{CO}_2 \) emissions.  
      To move forward, backwards, left, and right, press W, S, A, and D respectively.
       
      Press Q to see the previous year and E to see the next year.