Using limited resources, the team at NASA needs to invent a way to fit a square cartridge into a round hole in order to create a CO2 filter. This filter would prevent the CO2 levels from rising too high in the spacecraft. Otherwise, the crew will face complications such as impaired judgment and blackouts.
Phil provides a basic overview of chemicals and explains that they make up everything in the universe. He gives examples of everyday objects that are chemicals and briefly explains the periodic table of elements.