The video in the last assignment and the first one here were both released by NASA Goddard as part of their outreach efforts for the Orbiting Carbon Observatory-2 mission. This video (in addition to the National Climate Assessment reports you have looked at already) opens the door to thinking about how a closed systems (like the earth) can get out of whack when changes are made to the atmosphere.

A Breathing Planet Off Balance (2:32) 

Consider, why are we so concerned about carbon dioxide in Earth's atmosphere? What makes it a heat-trapping gas? What other atmospheric gases fall into this category?

This video (6:52) by a researcher at Colorado State University provides an explanation of why certain gases are of interest.

Consider, how might your students/visitors move like a molecule? A fun thought experiment and perhaps a whole new interactive learning opportunity in the making.