火灾是森林最危险的敌人,对林业生产的破坏性很大,至今还没有一个国家能根绝森林火灾,因此各国都重视护林防火工作。全世界每年平均发生森林火灾20多万次,烧林面积数百万公顷。加拿大、美国、日本、苏联、澳大利亚、意大利、法国、荷兰等,是森林火灾较多的国家。加拿大1947至1956年的十年间,平均每年发生林火5千多次,烧林面 Fire is the most dangerous enemy of the forest and is devastating to forestry production. No country has so far eliminated forest fires. Therefore, all countries value the work of forest fire prevention. An average of more than 200,000 forest fires occur each year in the world, burning forest area of ​​millions of hectares. Canada, the United States, Japan, the Soviet Union, Australia, Italy, France, the Netherlands, etc., are countries with more forest fires. During the ten years between 1947 and 1956 in Canada, there were on average more than 5,000 forest fires each year.