Tweet Ralph Keeling has written a letter to the world, appealing for help in keeping the Scripps CO 2 and O 2 programs going. Those bunnies who have not contributed yet, might do so now. Others could spread the word. The big button on the left takes you directly to the donation page.  ———————————————————————————————————————— Friends,I am writing as the director of the Scripps CO 2 and O 2 programs, which keep track of how these vital gases are changing in the atmosphere over time. The CO 2 measurements include the iconic Mauna Loa record, now commonly known as the “Keeling Curveâ€, which was started by my father in the late 1950s.