Brian Barton
Light pollution is a pressing issue that refers to the human-made alteration of outdoor light levels from those occurring naturally. It is a side effect of industrial civilization and urbanization, caused by the inefficient or unnecessary use of artificial light. This includes sources such as building exterior and interior lighting, advertising, commercial properties, streetlights, and illuminated sporting venues. Light pollution has severe ecological effects, disrupting ecosystems and the natural rhythms of both humans and wildlife, with adverse health consequences for both. It also diminishes our ability to observe stars and other celestial bodies, impacting astronomy and our cultural heritage. With light pollution increasing globally, it is essential to address this issue through legislative change, public education, and simple steps like adjusting light fixtures and using more appropriate light bulbs.
Explore related products
Light clutter
Light pollution is a global issue, with 83% of the world's people living under light-polluted skies and 23% of the world's land area affected by skyglow. It has been estimated that 80% of North Americans cannot see the Milky Way galaxy. Light pollution competes with starlight, interferes with astronomical observatories, disrupts ecosystems, and has adverse health effects. It can interrupt sleep and confuse the circadian rhythm, affecting the production of the hormone melatonin, which is released when it is dark and inhibited when there is light present.
Fireworks: A Beautiful but Toxic Tradition
You may want to see also
Explore related products
$31.61 $34.99
![Biological effects of oil pollution : a comprehensive bibliography with abstracts Melvin Light and Joseph J. Lanier. 1978 [Leather Bound]](https://m.media-amazon.com/images/I/61kelb6mFML._AC_UY218_.jpg)
Sky glow
Light pollution is a global issue, with 83% of the world's population living under light-polluted skies. It is the human-made alteration of outdoor light levels from those occurring naturally. It is caused by the excessive or inappropriate use of outdoor artificial light, and its sources include building exterior and interior lighting, advertising, commercial properties, offices, factories, streetlights, illuminated sporting venues, and boats. Light pollution has been shown to have adverse effects on human health, wildlife behaviour, and our ability to observe stars and other celestial objects.
The effects of sky glow are harmful to astronomy and the health of many organisms. It reduces the visibility of the stars and the Milky Way, and increases natural light levels at night. It also interferes with the natural body rhythms of both humans and animals, disrupting the production of melatonin, which results in sleep deprivation, fatigue, headaches, stress, anxiety, and other health problems.
Reducing sky glow involves using light sources of minimum intensity necessary to accomplish the light's purpose, turning off lights when not needed, and using full cutoff lighting fixtures. Full cutoff fixtures reduce the chance for light to escape above the horizontal plane, thus minimising light contribution to sky glow.
The Bortle Dark-Sky Scale is a tool used to quantify sky glow, with nine classes providing a detailed description of the darkness of the night sky inhibited by sky glow.
Human Impact: Ocean Pollutants and Their Sources
You may want to see also
Explore related products
Light trespass
Light pollution is the presence of any unwanted, inappropriate, or excessive artificial lighting. It is a side effect of industrial civilization, with sources including building exterior and interior lighting, advertising, commercial properties, offices, factories, streetlights, and illuminated sporting venues. Light pollution can have adverse effects on human health, wildlife behaviour, and our ability to observe stars and other celestial objects.
In some areas, such as unincorporated regions of Riverside County, California, light trespass has been made illegal, with violators subject to fines or even jail time. To address light trespass, it is important to be mindful of how lighting installations may impact others and to communicate with neighbours to resolve any issues. Additionally, organizations like the International Dark-Sky Association have developed model lighting ordinances to protect individuals' rights against light trespass.
To summarize, light trespass is a form of light pollution that occurs when unwanted light enters someone's property, impacting privacy and energy costs, and contributing to the broader issue of light pollution. Preventing light trespass involves being considerate in lighting installations, using appropriate fixtures and shields, and communicating with neighbours to address any concerns.
Light Pollution: Frogs at Risk
You may want to see also
Explore related products
Impact on human health
Light pollution is the human-made alteration of outdoor light levels from those occurring naturally. It is the presence of any unwanted, excessive, or inappropriate artificial lighting. While light pollution has various sources, including streetlights, advertising, offices, and factories, its effects are particularly harmful to human health, wildlife, and the environment.
The impact of light pollution on human health is significant, with research suggesting that artificial light at night can negatively affect human health in several ways. One of the primary concerns is the disruption of the body's natural circadian rhythm, which regulates sleep-wake cycles and various physiological processes. Artificial light, particularly blue light from electronic devices and LED bulbs, inhibits the production of the hormone melatonin, which is typically released in darkness. This disruption can lead to sleep deprivation, fatigue, headaches, stress, anxiety, and other health issues.
Furthermore, light pollution has been linked to an increased risk of obesity, depression, sleep disorders, and diabetes. The American Medical Association (AMA) has recognized the potential risks of exposure to light at night, especially the impact of white LED lamps on circadian sleep rhythms. Recent surveys have associated brighter residential nighttime lighting with reduced sleep times, dissatisfaction with sleep quality, excessive sleepiness, impaired daytime functioning, and obesity.
Additionally, light pollution may contribute to other diseases influenced by light and dark cycles. For example, reduced melatonin levels have been connected to cancer, although further research is needed to understand this complex relationship fully.
The effects of light pollution on human health extend beyond physical consequences. The excessive use of artificial light can impact mental health, with links to increased stress, anxiety, and depression. Moreover, it can disturb indoor environments, leading to the use of additional lighting and further exposure to artificial light.
Addressing light pollution requires collective efforts, such as implementing better outdoor lighting practices, supporting local legislation, and advocating for dark sky movements. By working together, communities can minimize the adverse effects of light pollution on human health and well-being.
Ozone: Friend or Foe to Our Environment?
You may want to see also
Explore related products
Impact on wildlife
Light pollution is the presence of any unwanted, excessive, or inappropriate artificial lighting. It is a human-made alteration of outdoor light levels from those occurring naturally. Light pollution competes with starlight in the night sky, interferes with astronomical observatories, and, like any other form of pollution, has adverse health effects on humans and wildlife and disrupts ecosystems.
Light pollution radically alters the nighttime environment by turning night into day. Nocturnal light interrupts sleep and confuses the circadian rhythm—the internal, twenty-four-hour clock that guides day and night activities and affects physiological processes in nearly all living organisms. One of these processes is the production of the hormone melatonin, which is released when it is dark and is inhibited when there is light present. An increased amount of light at night lowers melatonin production, which results in sleep deprivation, fatigue, headaches, stress, anxiety, and other health problems.
Research scientist Christopher Kyba notes that for nocturnal animals, "the introduction of artificial light probably represents the most drastic change human beings have made to their environment." Predators use light to hunt, and prey species use darkness as cover. Artificial lights can also impact wetland habitats that are home to amphibians such as frogs and toads, whose nighttime croaking is part of the breeding ritual. Artificial lights disrupt this nocturnal activity, interfering with reproduction and reducing populations.
Light pollution also attracts some organisms (moths, frogs, sea turtles) and concentrates them as a food source to be preyed upon, or results in a trap that exhausts and kills them. It repels other organisms, excluding them from habitats where they might otherwise survive. It also alters the day/night patterns, resulting in insufficient downtime for the body to repair itself and altering reproductive cycles.
Birds are also affected by light pollution. Warblers, thrushes, and other songbirds collide with buildings in New York City. Salmon are drawn to patches of water lit by bridge, street, or wharf lights, where they become easy prey for predators.
Light pollution is a major side effect of urbanization, and its sources include building exterior and interior lighting, advertising, outdoor area lighting (such as car parks), offices, factories, streetlights, and illuminated sporting venues. It is most severe in highly industrialized, densely populated areas of North America, Europe, and Asia, and in major cities in the Middle East and North Africa.
Human Impact: Polluting Our Environment
You may want to see also
Frequently asked questions
Light pollution is the human-made alteration of outdoor light levels from those occurring naturally. It refers to the presence of any unwanted, inappropriate, or excessive artificial lighting.
Light pollution has a range of negative effects on both humans and wildlife. It can interfere with the natural rhythms of plants and animals, disrupt nocturnal ecosystems, and cause sleep deprivation, fatigue, headaches, stress, and anxiety in humans. It also reduces our ability to view the stars and other celestial objects in the night sky.
Common sources of light pollution include street lamps, parking lot lights, exterior lights on homes and businesses, neon signs, advertising, commercial properties, offices, factories, and illuminated sporting venues. Light pollution is most severe in highly industrialized, densely populated areas.
