PORTLAND, Maine (WMTW) - More purplish smoke has been spotted rising from the stacks at Ecomaine Friday morning. This is the second day the colorful vapor has been seen in lifting into the air in ...

A pink and purple plume of smoke that has been seeping out of the Covanta incinerator in Newark is causing some residents to be alarmed. Pink smoke is generally a sign that Iodine is being burned.

What looked like pink or purple smoke was spotted Thursday coming from an emissions stack at the Lancaster County Solid Waste Management Authority facility in Conoy Township.Numerous viewers asked ...