Social Mathematics articles were recently revamped and featured on the Mathematics of Planet Earth 2013 (MPE2013) blog!
I expanded the idea of writing a letter to a teenager about climate change and put it in two posts. The first (on Jan 8th, 2013) is about making pancakes and the second (on Jan 11th, 2013) is about what can be done.
MPE2013 posts new ideas on climate mathematics daily, so check it out!