this was the urban audi folliot expo milan 2015 designed by the italian architects marco paoletti and cloudier per square of. the hollow structure was home to countless micro which function as photosynthesis machines they absorb c o 2 from the atmosphere and oxygenate the air in return the same team also collaborated on this curtain installation at the climate innovation summit in dublin last year each model captures about a kilo of c o 2 per day doing the work of 20 large trees dirty city air enters at the bottom and comes at contact with the alkie that store c o 2 molecules and air pollutants freshly photosynthesize oxygen is released at the top of the facade into the air. researchers at oxford university have discovered that spider's web covered in a glue that attracts and keeps hold of electrically charged particles in the air. this could form the basis for a new technology to tackle air pollution. this 7 metre construction smog free tower by the social design lab of dutch artist and innovator dan rosegarden cleans the air around it it uses positive ionization technology to captur