Throughout history, we can see that there have been many forest fires in history. In North America, at least 65,438+03 fires destroyed 40,000 hectares of forest. 187 1 Forest fires in Wisconsin and Michigan destroyed 1.7 million hectares of forest, killing 2,200 people. There are similar regional fires in 1894 Wisconsin, 19 10 Idaho and northwest Montana. Michigan Fire 188 1 Hundreds of people were killed; 1894 Fire in hinkley, Minnesota, 4 18 people were killed. 19 18 croquet fire in Minnesota, killing 55 1 person. The fire was so common that residents took a cold attitude when they heard it, as if they had lost their property.
The decisive factors of forest fire are the amount of fire source and combustible materials and the climatic conditions conducive to combustion and spread. The latter two factors are the impact of global climate change. The rainfall in the first few months of the fire danger period is an important parameter. Appropriate rainfall in spring and early summer will reduce forest fires, but it will provide sufficient undergrowth vegetation for future high fire risks. Severe early drought will completely dry this vegetation and increase the amount of combustible materials. Recently, floods and extreme droughts are fires in some countries, such as Australia, and every situation is conducive to fires. Relatively low humidity and strong wind also play a key role in determining the possibility and intensity of forest fires. Any large-scale fire depends not only on climatic conditions, but also on diseases (or insect infectious diseases), storms, previous fires or dry debris and residues produced by land development. Under the "fertilization" effect of high concentration of carbon dioxide, high fuel quantity is related to warm and humid climate conditions. Liaoning forestry public security organs * * * investigated and dealt with all kinds of forest damage cases 19 10, which curbed the upward trend of forest damage cases and effectively protected forest resources. According to reports, all kinds of deforestation cases investigated included 250 criminal cases and 660 administrative cases/kloc-0, which saved the country more than 20 million yuan in direct economic losses. Chen Jie, director of the Liaoning Provincial Forest Public Security Bureau, said that through the special campaign to crack down on the destruction of forest resources, Liaoning has cracked a number of cases with huge destruction of forest resources and strong social repercussions. From autumn 2006 to April 2008, Lv Weizhong, a criminal suspect in Heishan County, Jinzhou City, hired others to cut down trees 22 times * * * 6,533 trees. This is a case with the largest amount of deforestation, the worst impact and the worst nature in western Liaoning in recent years. At present, Lv Weizhong has been arrested by the forest public security organs, and the procuratorate has approved the arrest. The State Forestry Administration announced today the investigation and handling of eight cases of serious damage to forest resources. These eight cases are: Wang Zhan Pingren, Fengman District, Jilin City, Jilin Province illegally cut down more than 900 trees and plundered 7.9 hectares of forest land for sand mining. Due to the repeated intervention of relevant departments in Jilin Province, the case could not be reviewed and prosecuted normally, so the State Forestry Administration and the Supreme People's Procuratorate intend to review and prosecute in different places. Chen et al. in Banan District of Chongqing illegally purchased timber and cut down 708.5 cubic meters of natural forest. At present, the suspect 18 people have been arrested. A series of cases of illegal logging, illegal acquisition, transportation and processing of natural forests in Yulong County, Yunnan Province have so far cracked 6 criminal cases, arrested 7 suspects and banned 3 illegal wood processing dens. The village committee of Yinxinghe Village, Ba Shen Town, Ankang City, Shaanxi Province cut down more than 200 cubic meters of trees. At present, seven suspects, including Chen Hongming, former director of the village committee, have been arrested, and two others are still in pursuit. The Tuanshanzi Management Office of the Forestry Bureau of Tokyo City, Heilongjiang Province illegally cut 344.7 cubic meters of poplar, Chinese fir and other tree species, and has locked three major suspects. Yunnan Xinyu Group Co., Ltd. illegally occupies 9.4 hectares of forest land. At present, it has been ordered to go through relevant procedures. Tongzilin Quarry of Chengdu Railway Bureau in Sichuan Province illegally occupied 6.4 hectares of forest land in Yanbian County and cut 335 cubic meters of trees without a license. The local forestry department has imposed administrative penalties on the responsible units. The case of illegal occupation of forest land by Nierji Water Control Project in Nenjiang, Heilongjiang Province is still at a critical stage. This case involves the illegal occupation of 38.4 hectares of forest land.