How can a trace element comprising barely 0.04 percent of the atmosphere make any difference in our climate? It has become something of a prime “scientific” point from certain political leaders and denier pundits, but most of us know, if we were paying any attention in high school, that without that trace gas, earth would be lifeless and covered in ice. The following video with Dan Miller offers a visual demonstration of how trace elements can have very large impacts, and how we are moving past our “sweet spot” of greenhouse gas concentrations. More information from Miller is found on his website climateplace.org.