森林火灾的另一种危害据统计．在俄罗斯每年发生２０多万起森林火灾、烧毁有林面积１００多万ｈｍ２．这无异给国民经济带来巨大的损失。现已掌握火灾发生规律．每隔６～７年便出现一次相当大的循环周期。使火灾次数呈急聚上升趋势。就拿１９９２年８月２０日为例、仅在俄... Another hazard of forest fires According to statistics. More than 200,000 forest fires have taken place in Russia each year, burning more than 1 million hectares of forest area. This will undoubtedly bring huge losses to the national economy. Has now mastered the law of fire. Every 6 to 7 years there will be a considerable cycle. So that the number of fire emergency rise together. Take August 20, 1992 as an example, only in Russia ...