Villain to friend: how CO2 can produce food, shelter and energy

In 10 seconds? Algae, plankton and, artificial foams can absorb a lot of carbon dioxide (CO₂), which can be turned into useful products from food to bricks. And, it can power zero-emission plants too.

Now we should love CO₂?! Well, plants need CO₂ to photosynthesize. And algae too. Since we have so much of the climate change-inducing stuff, why not turn it into something useful? Researchers have found that CO2 released from power plants can be captured and used to grow highly nutritious microalgae in a 'bioreactor'. The resulting Spiritulina microalgae biomass contains up to 51% protein and can be used as a food source.