Have you ever been sitting at a light or accelerate to pull out of a parking lot and notice a cloud of exhaust behind your ride? It can be a little unnerving, because car exhaust smoke can actually ...

In addition to indicating a possible problem, smoke from the tailpipe means dirty emissions. Most states and some municipalities mandate periodic tailpipe-emissions testing. If your car is emitting ...

White, wispy exhaust smoke when you start your car on a cold day is usually perfectly normal as long as it goes away after a few minutes. But what causes that exhaust smoke when the temperatures are ...

Holly has a degree in Medical Biochemistry from the University of Leicester. Her scientific interests include genomics, personalized medicine, and bioethics.View full profile Holly has a degree in ...

DEAR CAR TALK: I'm 71 years old and have noticed that very few passenger vehicles on the roads today smoke from the exhaust pipe. Years ago, it was very common to see cars, even relatively new models, ...

Toxic chemicals that develop from car exhaust, smoking and backyard grilling might increase your risk of developing the autoimmune disease rheumatoid arthritis, a new study suggests. These chemicals ...