The Delimara power station can be seen smoking in this photo submitted by reader E. Compagno.

She expressed concern and asked whether that smoke was toxic, pointing out that she was finding it difficult to believe Enemalta when it said that its emissions were within EU limits.

"I live in Marsa and have been suffering from that black dust, reported from Marsa station, for years. As black as that," Ms Compagno said.

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