1 - Is present day on the left or the right? right
  2 - How far back in time does the graph go? 2009

3 - What are the units on the vertical axis? (degrees Celsius, degrees Fahrenheit, ppm, percentage,
 parts per million

4 - What is the range of values on the vertical axis? 20 parts per million  
 5 - Does the web site say where the data came from? yes it came from Noaa