1. Covering cities with huge bubble domes
They kind of remind us of The Simpsons Movie
2. Encouraging everyone to wear face masks
3. ... Or nose plugs
4. ... Or 'air-cleaning' bikes
In 2013 Beijing-based inventor Matt Hope unveiled a bicycle with a face mask attached, with the air filtered through it cleaned when you pedal. The bike cost 180 yuan ($29) and featured an Ikea bin as part of its filtration system.