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Why conduct research about light pollution in Cities?

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Research about light pollution in cities is conducted due to its significant impact on urban environments and inhabitants. Light pollution, caused by excessive and misdirected artificial lighting, affects various aspects such as lighting comfort, health, and environmental sustainability . Studies aim to quantify spatial heterogeneity, assess risk levels, and develop models to measure and mitigate light pollution . By utilizing satellite imagery and advanced technologies like GIS, researchers can analyze the relationship between urban factors and brightness levels, identify sources of light pollution, and propose spatial strategies for reduction . Understanding and addressing light pollution in cities is crucial for creating livable, sustainable, and aesthetically pleasing urban environments for all inhabitants, including humans, animals, and plants .

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Journal Article•DOI Spatio-temporal networks of light pollution Juan Antonio Pichardo-Corpus, H.A. Solano Lamphar, Rodrigo Lopez-Farias, O. Delgadillo Ruiz - Show less +3 more 01 Sep 2020-Journal of Quantitative Spectroscopy & Radiative Transfer 2 Citations	Research on light pollution in cities is conducted to analyze spatio-temporal networks of artificial lighting, quantify spatial heterogeneity, and understand its impact on urban processes and nocturnal environments.
Journal Article•DOI Research on Light Pollution Risk Level in Different Regions-- Hangzhou As An Example Guanqiao Wang, Heng Zhou - Show less +1 more 15 Jul 2023-Highlights in Science Engineering and Technology	Research on light pollution in cities is crucial to assess the risk levels and develop mitigation strategies due to the pervasive nature of light pollution in urban areas, impacting human well-being and ecosystems.
Open access•Journal Article•DOI Study of Light Pollution in Urban Lighting in Nisantasi Example Evren Korkmazer, Yasin Bektas, Mervebanu Aykanat, Shargiyaya Jevedzade, Gokçen Firdevs Yücel Caymaz - Show less +4 more 01 Dec 2019 2 Citations	Research on light pollution in cities is crucial to enhance urban livability, protect health of residents, and preserve aesthetic elements by evaluating lighting impact on comfort and environment.
Journal Article•DOI Assessment of Light Pollution in Indian Scenario: A Case of Bangalore Tanya Kaur Bedi, Kshama Puntambekar, Sonal Singh - Show less +2 more 01 Jul 2021-Journal of The Institution of Engineers : Series A 2 Citations	Research on light pollution in cities is crucial due to its global impact on star visibility, environment, and energy. The study in Bangalore highlights the need for mitigation strategies.

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What can be a problem statement for light pollution?5 answersLight pollution poses a significant problem statement encompassing various aspects. It adversely affects astronomy research, wildlife, ecosystems, and human health. The excessive and improper use of artificial lighting in urban areas contributes to visual discomfort, environmental damage, and health issues. The toxicity of blue light emitted by LEDs can lead to retinal damage and disrupt the synthesis of melatonin, impacting the internal clock and potentially causing degenerative diseases. Furthermore, light pollution results in glare, trespass, and sky glow, affecting the environment through scattering artificial light in the atmosphere, with certain light sources like LED advertising billboards having a more pronounced impact. Addressing these issues requires a comprehensive approach to mitigate the detrimental effects of light pollution on various fronts.

Did light pollution increase?5 answersYes, light pollution has increased globally and in specific regions. Studies show a worrying growth in light pollution over the past decade, with a 10% yearly increase in sky background due to artificial lighting, especially from LED technology. The power of global observable light emissions increased by at least 49% from 1992 to 2017, with a potential 270% to 400% increase in radiance due to LED technology. In China, light pollution spatially increased from 1992 to 2012, with varying trends in different regions and times, indicating an overall rise in light pollution levels. Furthermore, long-term trends observed in European metropolitan areas show an average increase in light pollution of 1.7% to 3.7% per year, indicating a significant rise in anthropogenic light pollution.

What are the causes of light pollution that affects human health?4 answersLight pollution, caused by various factors, has detrimental effects on human health. The main causes of light pollution include the fast advancement of lighting technology, resulting in a surge in outdoor lights and night-sky luminance. Additionally, the use of intrusive artificial light with poor design contributes to light pollution. Urbanization dynamics and the widespread use of artificial lighting in inappropriate locations also play a role in the problem. The negative impacts of light pollution on human health include sleep disturbance, elevated risk of cancer, weight gain, depression, and eating and movement disorders. Circadian rhythm disturbances caused by light pollution have been linked to health risks such as cancer, physiological troubles, and eye damage. The disruption of melatonin, a hormone involved in various physiological processes, is one of the mechanisms through which light pollution affects human health.

What is the effect of light pollution on insects?5 answersLight pollution has diverse impacts on insects, including moths. It can disrupt various life stages and key behaviors, such as flight-to-light behavior, reproduction, larval development, and pupal diapause. Moths can also be indirectly affected through hostplants and predators. Artificial light at night (ALAN) affects moth behavior and physiology, but there is limited direct evidence of its impact on populations. However, there is a need to determine the potential contribution of ALAN to insect declines compared to other drivers of change. Precautionary strategies are recommended to mitigate possible negative effects of ALAN on insect populations. Light pollution alters plant toughness and has direct and indirect effects on herbivorous insects, indicating cascading impacts on multiple trophic levels. Light pollution affects migratory organisms, including those active during the day, at local, regional, and macroscale levels, highlighting the need for conservation efforts. ALAN perturbs circadian clocks, affecting reproduction, foraging, and survival of insects. Bioluminescent insects and their sexual signals are particularly affected, and the phototactic response to light increases predation and alters activity. Streetlights affect the orientation and movement patterns of moths, potentially impacting their reproductive success and ecosystem services.

What are the effects of light pollution on biodiversity?5 answersLight pollution has detrimental effects on biodiversity. It affects migratory organisms, including birds, reptiles, and amphibians, as well as humans. The impacts of light pollution range from local to macroscale, and extend beyond species that are active at night. Artificial light disrupts fundamental biological processes such as reproduction, foraging, and predator defense, leading to behavioral and physiological alterations and increased mortality in various species. Light encroachment into previously dark areas is consistently high in regions of high species richness, posing a threat to global biodiversity. The effects of light pollution on circadian physiology, organismal fitness, life history traits, population trends, and community interactions are still being studied. Understanding these effects and implementing measures to reduce light pollution are crucial for conserving biodiversity.

How does light pollution affect human health?4 answersLight pollution has a negative impact on human health. It can lead to sleep disturbances, with at least 70% of people experiencing difficulty sleeping due to light pollution. Additionally, excessive lighting can harm a person's overall health, as reported by 90% of respondents. Light pollution has also been associated with various health threats, including obesity, mental disorders, and cancer. The disruption of natural light-dark cycles caused by light pollution interferes with the circadian photoentrainment of organisms, leading to adverse health effects. The toxicological mechanism of light pollution involves the alteration of clock genes and disturbance of melatonin homeostasis. Therefore, it is crucial to understand and regulate light pollution to create a healthy lighting environment and mitigate its impact on human health.

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