Version with boosted sound at https://youtu.be/TgkJ1foRnsY
This is a video explaining the concept of productive and unproductive labour.
Link to the slides : https://docs.google.com/presentation/d/1xpLi9bjESHmZeNXJu4oe7yv-h5rf9NY59BVKO_WpBi4/edit?usp=sharing
