Freakonomics is a casual economics blog. There isn’t much jargon used and you don’t need any knowledge about economics to understand their podcasts. The aim is to apply economics thinking to find the hidden side of problems. I find some of the subjects to be very interesting. The podcast are spoken clear and at a good pace, and some even have a transcript. It’s like they were made for language learners!
Take a look at their archive:
http://freakonomics.com/radio/freakonomics-radio-podcast-archive/