Dutch unveil giant outside vacuum cleaner to filter dirty air

Inventors develop large purifying system intended to capture tiny toxic particles from the surrounding atmosphereDutch inventors have unveiled what they called the world’s first giant outside air vacuum cleaner – a large purifying system intended to filter out toxic tiny particles from the atmosphere surrounding the machine.
“It’s a large industrial filter about eight metres long, made of steel ... placed basically on top of buildings and it works like a big vacuum cleane