Today is a Spare the Air Day

Because of pollution from smoke and fire, today is a Spare the Air Day in Silicon Valley and the rest of the Bay Area.
The Bay Area Air Quality Management District says the wildfires in Lake County, and other points north, are causing smoke pollution to drift into the Bay Area, which is already being affected by smog.
As with all summer spare the air days, the district is recommending outdoor activity be limited, and that driving be kept to minimum if possible.
This is the fifth Spare the Air day of the summer.