Photo-like, true color images provide a very simple way to see if smoke, dust ... Haze from cars and power plants is gray-white in true color images. It is difficult to pin-point a single source, but ...

PHILADELPHIA (WPVI) -- Other than a spotty shower late tomorrow, much-needed rainfall arrives late week. TONIGHT: Partly cloudy skies. Low 31. WEDNESDAY: Our mildest day of the week with clouds ...