It may look like an innocent green plant, but its name gives it away as something far closer to a robot or interstellar rocket. Neo Px is a bioengineered plant capable of purifying indoor air at an unprecedented scale, the first in a potentially long line of plants with super powers. "Our first product, Neo Px, is equivalent to up to 30 regular houseplants in terms of air purification," says Lionel Mora, co-founder of startup Neoplants. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES