Black smoke billowing out of cremation services is not completely unusual. Not only was it ugly, it produced environmental hazards https://www.mountainx.com/article/17909/Crematorium-smoke-triggers-complaints.
Today’s news is that there is a more ecologically sound method to dispose of the body. “Our technology (..) can remove moisture at a cost-effective rate and at a suitable speed to make it a viable alternative to cremation with lots of environmental benefits.” https://in.reuters.com/article/2012/09/12/environment-death-funerals-idINL6E8K5BOS20120912