I am unable to view the graph on page 14 of "The Future of Life on Earth" Express edition by Michael Bright. However, if you are trying to determine the unit of temperature measurement from the graph, you should look for clues on the axes or legends in the graph itself. Typically, temperature would be indicated in either degrees Fahrenheit or degrees Celsius.
If you have any specifics or context from the graph that you can share, I can help you analyze it further!