In forestry, slash refers to the coarse and fine woody debris generated during logging operations or through natural forest disturbances such as wind or snow). Logging slash is the debris left in the forest after a harvest, and it can serve a range of purposes. However, it may also increase fire hazard, and some North American states have passed laws requiring the treatment of logging slash). Logging slash can be chipped and used in the production of electricity or heat in cogeneration power-plants, or simply burned onsite). In addition, loggers can use the branches and tops of trees as part of the timber-harvesting process to provide a track for forest machines, which reduces ground damage). Slash is also a waste product from forestry operations, and it has been a key issue in the forestry industry and its practices. Finally, slash can help reduce the impact of rain on the forest floor after a timber harvest opens the canopy.