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Essays Of Fire

Fire is a chemicalreaction that gives off light and heat. It is an example of the chemical process of oxidation. Fire is also very dangerous, it can cause houses, trees and many other things to burn into ashes. Forest fires are incredibly dangerous and can devastate a huge area in a matter of minutes and fires can almost hurt more than a thousand people a year.

Fire can be made in many different ways such as rubbing sticks together for a long time, using Flint and steel, matches and more. In some camps there is a camp fire; around the camp fire there is usually some logs to stop it from spreading. Fire can also made by the Sun's energy.

Safety[change | change source]

Fire is very hot. A person should never touch fire, because fire may burn up anything that gets too close. If human skin touches fire, the skin may burn which can take some time to heal. If a fire gives off much smoke, a person's mouth should be covered with a wet cloth, because if too much smoke is breathed in, it is possible to faint. No fuel source should be near fire.

Uses[change | change source]

Fire can be very useful if it is treated carefully. It has always been very important for people to be able to make fire, because people need its heat on cold days and to cook things. Its light is also useful to be able to see in dark places.

Destructive Uses[change | change source]

If fire is not treated carefully, it can be very dangerous. A fire that got out of control once destroyed 17,400 km², an area the size of New York City, in the United States.[source?]Forests can burn down if fires are not controlled. Every year, large areas of forests are destroyed because of fire, including in Europe. This usually happens in summer. Firefighters or firemen are people with special training to stop fires, or to keep a fire under control.

Fire needs three things to burn: oxygen, fuel, and heat. Fuels can be wood, tinder, coal, oil or any other substance that will easily oxidize. Once a fire is burning, it creates its own heat, which allows the fire to keep burning on its own for some time.

Controlling[change | change source]

A fire can be stopped in three different ways, by removing any of the three things it needs to burn:

  • The fuel can be removed. If a fire burns through all of its fuel and extra nearby fuel is removed, the fire will stop burning.
  • The oxygen can be removed. This is called "smothering" a fire. Fires cannot burn in a vacuum or if they are covered in carbon dioxide.
  • The heat can be removed. The most common way to remove heat is to use water to absorb that heat, putting the fire out.

However, some fires cannot be smothered, such as magnesium flames. They can burn in CO2, nitrogen, and some other elemental compounds, although they cannot burn in noble gases such as helium.

Reactions[change | change source]

Fires are usually combustion reactions that take carbon, hydrogen, and oxygen.[source?] The products are very commonly water, and carbon dioxide, although there are other examples that avoid this generalization, such as burning magnesium in air, which makes magnesium oxide. Fires can occur in many ways and there are many types of fire which, if not treated correctly, can cause total devastation. There are wood fires, gas fires, metal fires, and more.

Wood fires can usually be put out with water used to absorb the heat, but metal fires are too hot for water to absorb enough heat to put out the fire. If water is used to extinguish ("put out") a metal fire, the water will simply evaporate. For metal fires, sand can be used to cover the fire and choke it off from obtaining oxygen. A fire extinguisher can put out most fires.

Wikimedia Commons has media related to Fire.






(part 1 of 3)
For the 1880 census, Charles Sargent mapped forest fires. Fire was nearly everywhere, some places more vigorously than others. The amount of burning was, by today's standards, staggering. A developing nation, still primarily agricultural, the United States had a fire-flushed landscape not unlike those of Brazil and Indonesia in more recent decades. While lightning accounted for some ignition, and steam power (notably locomotives) for a growing fraction, the principal sources of fire were people—people burning for hunting, for traditional foraging, for landclearing, for clearing field fallow, for pasturage, for the ecological equivalent of housecleaning. And of course there was a significant amount of sheer fire littering. Where spark met large caches of combustibles (as around logged sites), horrific fires, implacable as hurricanes, broke out. The idea that one might abolish fire seemed quixotic, in fact, dangerous. Without fire most lands were uninhabitable. Free-burning fires came and went with the seasons, as unstoppable as the movement of the sun across the heavens. Right-thinking conservationists, as good Progressives, argued for government intervention to stop them.

Wildlandfire.com

Southwest U.S., 1999

"too much of the wrong kind of
fire, not enough of the right kind"


By the end of the 20th century, that scene had changed almost beyond recognition. Everywhere fire's domain was shrinking. Flame had vanished from houses and fields. Its primary habitats were the public lands of the West and those still-rural scenes of the forested South.

The problem with fires became one of maldistribution—too much of the wrong kind of fire, not enough of the right kind. Most fires burned as wildfires, set by lightning, accident, or arson. Many lands suffered from a fire famine, the shock of having a process to which they had long adjusted abruptly removed. On many sites, natural fuels had ratcheted up to levels against which fire suppression stood helpless. Government fire agencies sought to reinstate fire, often at considerable cost and risk, even in the face of public skepticism.

Between 1994 and 2000 the magnitude of the crisis became undeniable. In July 1994 a wildfire, kindled by lightning, overran a fire crew on Storm King Mountain in Colorado and killed fifteen crew members. The fatalities prompted not merely the usual review panels and reports but a profound soul-searching by the federal agencies about what justified putting those lives at risk. A revised federal policy emerged in December 1995. The alternative to fire control, it appeared, was controlled burning. This reflected common wisdom, accrued over the last thirty years.

In April 2000, however, the National Park Service set and lost two burns, the Outlet Fire on the North Rim of the Grand Canyon in Arizona and the Cerro Grande Fire at Bandelier National Monument in New Mexico. The first forced the evacuation of the North Rim and only ceased its run when it breached the canyon's rim. The second scoured the town of Los Alamos like the cutbank of a river. The agencies ordered a standdown from prescribed burning for a month and the Secretary of the Interior placed the Park Service program under a moratorium.

NPS

Outlet Fire, Grand Canyon, 2000


"The two options for 'managing' fire—fighting them and lighting them—had both failed, spectacularly."

 

In truth, the 2000 fire season proved dismal for federal fire agencies, with burned area from wildfires reaching fifty-year highs, prescribed fires escaping, and suppression costs climbing to a stratospheric $1.3 billion. The two options for "managing" fire—fighting them and lighting them—had both failed, spectacularly. Fire suppression alone could not indefinitely contain fire. Yet prescribed fire was not ecological pixie dust that, sprinkled over degraded lands, could render them magically whole. More than starting and stopping ignition and shoving biomass around, the reintroduction of fire was akin to reintroducing a lost species. Fire needed a habitat. A National Fire Plan, authorized in late 2000, sought to begin reforms.


The Humanities of Fire

UVA Lib.

Harvey Ellis, Spring: Burning Fallen Trees in a Girdled Clearing, 1841

"Fire enters humanity's
moral universe."

Stephen Pyne on man's moral stance with fire; video clip from NOVA/WGBH "Fire Wars" (2002).

We hold a species monopoly over fire. With fire we claim a unique ecological niche: this is what we do that no other creature does. Our possession is so fundamental to our understanding of the world that we cannot imagine a world without fire in our hands. Or to restate that point in more evolutionary terms, we cannot imagine another creature possessing it.

Yet while humans come genetically equipped to manipulate fire, we do not come programmed in its use. We apply and withhold it according to social institutions, cultural norms, perceptions of how we see ourselves in nature. Different people have created distinctive fire regimes, as they have distinctive literatures and architectures. In this way fire became both natural and cultural. If fire measures our ecological agency, so how we choose to apply and withhold it testifies to our understanding of that agency and the values, choices, and means by which we act. Fire enters humanity's moral universe, and thus into the scholarly realm of the humanities.

Consider, for example, Sargent's map, a complicated cartography. It records geographic conditions that make fire more plausible in some places than in others (the Northeast, for example, lacks a distinctive fire season; the Southwest experiences one annually). The map includes fires kindled from many sources. Lightning ignited some of them. But mostly people did, not simply out of perversity or recklessness but because fire is a profoundly interactive technology, and very few land-use practices happen without its catalytic presence somewhere in the web of causation.

It remains a map, not an image. Interpretation demands some understanding of fire behavior and fire ecology, and some understanding of how people use fire, because we compete with nature for fire control over the landscape and we compete with one another. Often rival fires clash. People rarely burn exactly as nature does, and what one group considers a controlled burn another might condemn as a wildfire. Interpreting the map thus requires some understanding of human history and how people have expressed their relationship to the natural world.


continued








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