The title is exactly what this great 4 minute talk is about! This isn't just some out there idea waiting to happen, though. This is a report on something that's been done which you can also do at home! A practical idea!

Researcher Kamal Meattle shows how an arrangement of three common houseplants, used in specific spots in a home or office building, can result in measurably cleaner indoor air.

With its air-filtering plants and sustainable architecture, Kamal Meattle's office park in New Delhi is a model of green business. Meattle himself is a longtime activist for cleaning up India's air.