Pothos (Epipremnum aureum)

Pothos is the undisputed champion of unkillable houseplants, outliving most rivals by tolerating low light, irregular watering, and neglect that would fell a snake plant. Its trailing vines can reach 10 feet indoors, while it purifies air by removing formaldehyde and benzene—proven in NASA's Clean Air Study at 90% effectiveness over 24 hours. Propagation is effortless: snip a cutting, drop it in water, and roots appear within a week. Every dorm and office has one because it simply refuses to die, outperforming #2 by thriving even in dim corners where even a snake plant might sulk.