For teachers looking to inject some "new blood" into their tried and true lectures, consider grabbing some of my
free short videos covering the big issues in environmental and urban economics. If your students aren't interested in strange ideas and good jokes, then don't bother. At minimum, these videos will provide a basis for having a class debate on key issues that might be lost in the fog of algebra and geometric proofs that form the basis for so much lost time in undergraduate classes.