先谈火源。火源是燃烧三要素之一。在有利于森林燃烧条件下,火源是发生火灾的主导因素。火源不同,引起林火种类也不同。引起森林火灾的火源,总的分为人为火源和自然火源两大类。 (一)人为火源 Talk about the source of fire Fire is one of the three elements of combustion. In favor of forest burning conditions, the source of fire is the dominant factor in the fire. Different sources of fire, forest fire caused by different types. The sources of fire that cause forest fires are generally divided into two categories: human sources of ignition and natural sources of ignition. (A) people as a source of fire