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A wildfire, forest fire, or a bushfire is an unplanned, uncontrolled and unpredictable fire in an area of combustible vegetation. [1] [2] Depending on the type of vegetation present, a wildfire may be more specifically identified as a bushfire ( in Australia ), desert fire, grass fire, hill fire, peat fire, prairie fire, vegetation fire, or ...
In graph-theoretic terms, the theorem states that for loopless planar graph, its chromatic number is ().. The intuitive statement of the four color theorem – "given any separation of a plane into contiguous regions, the regions can be colored using at most four colors so that no two adjacent regions have the same color" – needs to be interpreted appropriately to be correct.
Wildfires can happen in many places in the United States, especially during droughts, but are most common in the Western United States and Florida. [3] They may be triggered naturally, most commonly by lightning, or by human activity like unextinguished smoking materials, faulty electrical equipment, overheating automobiles, or arson .
The 2020 wildfire season involves wildfires on multiple continents. Below is a partial list of articles on wildfires from around the world in the year 2020. Asia [ edit ]
The 2020 Oregon wildfire season was the most destructive on record in the state of Oregon. The season is a part of the 2020 Western United States wildfire season . The fires killed at least 11 people, burned more than 1,000,000 acres (400,000 ha) of land, and destroyed thousands of homes.
Wildfire modeling attempts to reproduce fire behavior, such as how quickly the fire spreads, in which direction, how much heat it generates. A key input to behavior modeling is the Fuel Model, or type of fuel, through which the fire is burning. Behavior modeling can also include whether the fire transitions from the surface (a "surface fire ...
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