the unions pat morrison, >>>>put those flames flame retardants in their and the virus is going, that's what we're breathing in some of the most toxic air that you will ever find anywhere >reporter>back in san francisco, venus singles test showed flame retardants too, but she's says is frustrating. >>>>we've >>great >>strides in making our cars safer over the decades. i just think we can do better and actually have healthier, safer cars. >reporter>in the meantime, the researchers recommend when you 1st get in your car roll down the windows and let the air out. >liz>take a live look at oakland. now we know bay area traffic can be really frustrating, right? well, now, a new study finds oakland is the worst city in the nation to drive in. that's according to forbes adviser now the study looked at 47 metro areas and considered a number of metrics, including driving experience safety cost of owning a car and access to maintenance. oakland was given the top spot because of the high number of deadly crashes. high gas prices and long commute. times miami came in 2nd, followed by san francisco.