Though I have seen this graph many times, I continue to be amazed that some can look at it and not see the connection to climate change. The way I have taught this issue with my students in the past is to lead with the evidence, the over whelming collection of evidence and then let the kids come up with their own conclusions. I feel very strongly that kids need to make their own meaning, the work needs to happen in their heads, if I do all the work then I will do the learning, if I want the kids to learn, then they need to do the thinking. Kids do not learn by us telling them.I am excited to see more of the evidence on the NASA site.