Newspaper sellers in Mongkok and Central are indifferent to government claims that air has become clearer in the past year. Chan Kwok-chiu, who has been selling papers near the Sincere department store in Argyle Street, Mongkok, for 20 years, said he could not tell the difference. 'The air quality never changes. My sensitivity is so low because I'm so used to the suffocating air here. People just buy newspapers - they don't seem to pay attention to air pollution,' he said. Fellow Mongkok seller Ng Yan-kau said air quality had improved but attributed the change to pedestrianisation in Sai Yeung Choi Street where she has worked for 20 years. In Central, Leun Kam-chuen, who has been selling newspapers for four years in Queen's Road, said: 'The air quality is bad. I don't think there's any improvement.' But seller J. P. Tsang said she thought bans on trucks parking in busy streets such as Pedder Street in recent years had helped clear the air. She has been in Central for 15 years.