The district is calling for a voluntary ban on using wood-burning stoves, in order to improve air quality.为改善空气质量，该区呼吁大家主动停用烧木柴的炉子。Gas stoves can be used with greater facility than the old coal-burners.煤气炉使用起来比老式煤炉方便。Some stoves are oil burners; others are gas burners.有些炉子是烧油的，有些是烧瓦斯的。