We’ve got a comment from a listener following-up on Andrew’s…CO2 meter?! A scientifically accurate discussion on oxygen-carbon dioxide air mixtures. What’s a poison and what does it mean to get poisoned? Brian and Justin’s World Greatest Con podcast is now on Patreon, but they have conflict over skittish advertising money despite the successful launch. Websites for podcasts: what should they have and what is their value? Send your project questions/ideas to [email protected], subject line “After Things.”