For months, parts of Indonesia’s Borneo and Sumatra islands have been ablaze(熊熊燃烧的). The fires are sometimes lit illegally as a cheap way to clear land(清理土地) for plantation(种植园)s of oil palm, of which Indonesia is the world’s largest producer.
数月来，印度尼西亚的婆罗洲和苏门答腊部分地区一直在燃烧。这些火有时是非法点燃的，因为这是清理土地、开辟油棕榈种植园的一种廉价方式，而印尼是全球最大的油棕榈生产国。
So prevalent is the technique that it even has a special term: slash and burn(刀耕火种).
这种做法如此普遍，以至于它甚至有一个专门的名称：刀耕火种。
Many of the fires begin as small-scale blaze(大火、烈焰)s. But in hot, dry conditions, can easily spiral out of control(失控、急剧恶化), sending toxic(有毒的) smoke across borders(跨境、越过国界) and affecting the air quality of millions in Indonesia and beyond.
许多火灾起初只是小规模燃烧。但在炎热干燥的条件下，很容易失控，将有毒烟雾送过国界，影响印尼及更远地区数百万人的空气质量。