Tokyo >> Angry car owners have descended upon the Air Self-Defense Force after dye, thought to be from the colored smoke used by the Blue Impulse aerobatic team on the opening day of the Tokyo ...

It's standard for older diesel engines to emit black smoke under full load, which occurs during "turbo lag." As the diesel engine waits for the turbo to spool, the machine will blow thicker black ...

Millions of horrified Americans have watched clear blue skies morph into thick orange fogs in recent days as wildfires in Canada and a stalled low-pressure weather system have sent thick plumes of ...