As the sun begins to set over Kampung Rasa in the Hulu Selangor district of Selangor, the machines in an e-waste recycling factory situated approximately 1km away from the residential area begin to operate and an acrid smell fills the air.

Residents have endured the stench of odour pollution, allegedly caused by Efast Industries Sdn Bhd, almost every night for several years, long-time resident Wong Yi Heng told Malaysiakini.

Since Efast’s facility was erected in the vicinity of the village in 2019, Wong claimed that the factory has always...