Mask outdoors when its particularly bad, and use an air filter indoors. IKEA has recently released a decent air filter for ~$40. Good ones cost a bit more, bu

Mask outdoors when its particularly bad, and use an air filter indoors. IKEA has recently released a decent air filter for ~$40. Good ones cost a bit more, but even the basic one removes plenty of small particles with an HEPA-like stage.