At a DAP awareness forum held in a Kuala Lumpur hotel last night, environmental expert Gurmit Singh said one of the biggest hazards of incinerators is the generation of dioxin affluents in the environment.

Gurmit, who is a representative of the Environmental Protection Society Malaysia (EPSM), said the effects of dioxin are "emotional" as they are invisible until much later.

"There is also no continuous monitoring system for dioxin," he told about 80 residents, affected by the project, who attended the three-hour forum.