The tower that clears smog and helps to make jewellery
Artist Daan Roosegaarde has been developing a giant ioniser which sucks up dirty air and emits clean air.
Using this process, the smog particles can be converted into jewellery - rewarding donors who have supported the project through crowdfunding.
BBC Click has spoken to Daan Roosegaarde about his latest piece of work which will debut in September.
This is additional online-only content from Click