Low-tech air filter for bad air quality emergencies This week the SF Bay Area is suffering from yet another massive wildfire filling our air with smoke, causing unhealthy air conditions. The Camp Fire sprang up on November 8, 2018, and destroyed Paradise California, a town in the Sierra Nevada Mountains. While there is a serious tragedy happening in the zone directly affected by the fire, a large chunk of California now has unhealthy air. Further, officials are predicting unhealthy air conditions will remain in place for another week. "Unhealthy" is the designation by the Environmental Protection Agency (EPA) for air conditions we currently have. The situation does not warrant spending hundreds of dollars on a fancy air filter system that will be used only for a few days. Fortunately there is a lower cost easy-to-implement solution.