Residents in Singapore are growing increasingly worried about the persistent air haze, with some describing it as a yearly concern that is getting worse. The issue has sparked concerns for parents and families with young children, who are advised to keep their windows closed to minimize exposure.

In recent weeks, Singaporean Cindy has been troubled by an odour lingering in the air during her evening walks to the gym. “It’s the same situation every year, but I would say that the fogginess and burning smell have been getting stronger for the last year or so,” said the 33-year-old resident who lives in the southern estate of Telok Blangah. “I have a baby, so it concerns me a lot, and I know many other families feel the same,” she said. “I always keep our windows closed, which is not very...