Articles tagged with Light Pollution
Regions with sharp declines in flying insects also experience high levels of light pollution, suggesting a link between artificial light and insect population declines. Light pollution can disrupt natural behavior, cause genetic exchange limitations, and impact ecosystem services like pollination.
Researchers used a container to measure light extinction coefficients, gaseous NO2, and black carbon from ground surface to 260m during daytime and nighttime. The study found temperature inversion and local emissions as major factors affecting vertical profiles of air pollutants.
Researchers from Martin Luther University Halle-Wittenberg have developed a cost-effective method to break down pollutants in water, using a green LED light, catalyst, and vitamin C. The new process produces hydrated electrons that can react with stable substances and break them down into harmless components.
Recent research reveals that even weak Moonlight and aurora-induced light can trigger a rapid migration of Arctic zooplankton to deeper waters. This phenomenon is caused by the animals' extreme sensitivity to light, which can be disrupted by light pollution from vessels or ocean structures.
Researchers found that city lights in metropolitan areas like Boston, New York, and Philadelphia attract large densities of migratory birds, even from far away. This can lead to increased mortality risks from collisions with buildings, vehicles, and predators like domestic cats, as well as resource depletion.
Zooplankton respond to natural light cycles in the upper water column, but artificial light from research vessels disrupts this pattern. The researchers found that zooplankton migrated deeper into the water when exposed to artificial light.
A recent international study suggests that LED lighting upgrades could lead to increased light pollution, as individuals and cities switch to brighter lamps. The 'rebound effect' might cancel out initial energy savings, causing global night-time surface brightness to increase by 2% annually.
A global analysis found that artificially lit surface of Earth at night is growing in size and brightness in most countries. This trend has nearly matched the global rise in gross domestic product.
Researchers at UCLA discovered that moving bus stops away from busy intersections can significantly reduce the amount of pollution bus riders are exposed to. By relocating stops 120 feet away from intersections, pollutant concentrations decrease sharply with distance.
Researchers have successfully shaped nano-sized gold particles using ultrafast lasers, enabling the creation of
A new study found that nighttime light exposure can pass on immune and endocrine problems to hamster offspring. Researchers at Ohio State University exposed adult hamsters to dim light at night, then monitored their effects on the next generation.
Researchers used NASA satellites and airport visibility sensors to estimate exposures to air pollution in US troops who fought in Iraq and Afghanistan. The studies aim to build reliable tools for epidemiologists to tease out links between respiratory health and exposure.
The STARS4ALL project is a EU-funded initiative that aims to promote dark skies across Europe through crowd-sourced data collection and analysis. Researchers are monitoring social media interactions between citizen science volunteers and participants to design new apps and projects for contributing light pollution data.
The new atlas documents the world's level of artificial skyglow, affecting nocturnal organisms and ecosystems. The study found that Italy and South Korea have the most polluted skies, while Canada and Australia have the least, with residents in India and Germany being more likely to see the Milky Way.
A new global atlas reveals that the Milky Way is only visible from 33% of the world's population, with 80% of Americans experiencing light-polluted nights. This widespread issue affects not only human connections to nature but also confuses wildlife and exposes them to fatal consequences.
A new study by Swiss zoologists found that urban moths have learned to avoid light due to high mortality rates in rural populations. The researchers observed a significant decrease in flight-to-light propensity among moths exposed to heavy light pollution.
The STARS4ALL project aims to reduce light pollution in European night landscapes, promoting environmental protection and economic savings. The initiative includes 10 projects, such as broadcasting astronomical events, creating a logo for sustainable lighting, and involving citizens in change-making movements.
A study of 15,863 people found that nighttime light exposure was significantly associated with sleep duration and disturbances. People living in urban areas with intense street lights were six percent more likely to sleep less than six hours per night.
Pedestrians perceive higher safety in streets with white light compared to yellowish lights, possibly due to improved face identification. The study also found that high blue-wavelength lights inhibit melatonin levels more effectively.
Studies by Dartmouth researchers found that mixing of sediments and microorganisms significantly impact methylmercury production, contradicting earlier assumptions about sediments as the primary source.
A new portable ultra-broadband laser can sense chemicals for various applications, including security and medicine. The compact device emits light across a broad spectrum of frequencies, enabling real-time detection of chemicals.
A new study reveals that stadium lighting can alter patterns of bat species activity and feeding, potentially leading to cascading effects on the ecosystem. Urban exploiter bats are more likely to hunt insects attracted to bright light pollution sources like stadiums.
The study found that between 30-47% of Balearic shearwater colonies are exposed to high levels of light pollution, posing a significant threat to the species. The researchers recommend establishing rescue campaigns specifically for emancipation periods to reduce mortality rates among these endangered seabirds.
Research finds artificial light from coastal communities and shipping alters marine invertebrate communities, affecting fouling and ecosystem services. The study warns of potential impacts on coral reefs and other sensitive environments.
A study by University of Exeter researchers found that artificial light at night inhibits flowering in certain plants and suppresses aphid populations. The low-intensity amber light was more detrimental to the pea aphid population than white light, highlighting complex interactions between predators and resources.
Drivers spend an average of 1.5 hours a day in their cars, with signalized intersections being major pollution hotspots due to frequent changes in driving conditions. Exposure to nanoparticles from vehicle emissions increases by up to 25% when passing through traffic lights.
A recent study found that American cities emit several times more light per capita than comparably sized German cities. The difference grew with city size, highlighting the need for further research on urban light emissions to uncover the reasons behind these disparities.
Researchers develop composite material that harnesses visible light to degrade endocrine disruptors, including BPA and phenol, in a promising breakthrough. The method offers a more efficient alternative to existing ultraviolet light-based approaches.
A 15-year study found thousands of birds are attracted to artificial lights during their first flights, leading to high mortality rates. Turning street lights off decreased the number of grounded fledglings, suggesting a link between light pollution and bird deaths.
A third of the world's population uses plant-based solid fuels for cooking, heating, and lighting, resulting in high levels of household air pollution. The Commission concludes that an estimated 600-800 million families worldwide are at increased risk of illnesses such as respiratory tract infections and lung cancer.
Researchers found that light pollution disrupts the reproductive cycle of mouse lemurs, causing testes to grow larger and testosterone levels to increase. The study also showed that light pollution affects the daily activity pattern of lemurs, delaying their nocturnal behavior.
A team of researchers developed a new approach to identify and quantify chromophores in ancient paper, which contributes to the understanding of visual degradation processes. The study applied this technique to Leonardo da Vinci's self-portrait, revealing its degradation state and providing insights into environmental conditions.
A recent study found that light pollution impedes fruit-eating bats from dispersing seeds, which is crucial for tropical forest regeneration. As a result, seed rain is reduced, threatening the natural succession of forests in illuminated habitats.
A recent study on gasoline direct injection (GDI) technology found that it can reduce particulate matter emissions to meet new California and EPA standards. GDI vehicles tested over a lifetime of 150,000 miles hovered near or below the limit set by the new regulations.
Research found that artificial lighting and noise cause blackbirds in city centers to become active earlier, starting their dawn song up to five hours before sunrise. This alters their natural cycles, affecting their ability to defend territories and interact with humans during rush hour.
A new LED streetlight design harnesses high-efficiency LEDs to provide uniform illumination while minimizing light pollution and glare. The design achieves an optical utilization factor of 51-81 percent, reducing light pollution by up to a fifth.
Coral reefs are evaluated using fluorescence levels which decrease with stress and increase before bleaching, making it a non-invasive early indicator of coral health. This novel method improves on current testing technologies and could aid in reef conservation efforts.
Researchers at Ruhr-University Bochum develop novel composite materials to enhance the degradation rate of photocatalysts. The goal is to implement these photocatalysts into a liquid paint for easy coating on photoreactors, enabling efficient and cost-effective water decontamination in remote areas.
International experts warn about the adverse effects of exposure to light at night, particularly LED lighting, on circadian rhythms in nature and human health. The panel highlighted the harm caused by short-wavelength illumination to various species, including mammals, birds, and plants.
Research by the University of Exeter finds that light pollution is transforming communities of insects, with more predators and scavengers found near artificial lights. This could have a knock-on effect on entire ecosystems, including birds and mammals that rely on these species for food.
A new international study reveals that 'white' light bulbs emit shorter wavelengths that suppress melatonin production, causing behavior disruptions and health problems. The researchers recommend limiting the use of 'white' light, adjusting lampposts to reduce light pollution, and using energy-efficient lighting.
Research by physicists and ecologists found that overcast skies are up to three times brighter than clear nights, amplifying ecological light pollution in urban ecosystems. The study highlights the need to consider cloud cover when assessing biological impact of light pollution.
Researchers discovered that sports stadiums and street lighting can increase daytime ozone levels, a key air pollutant in heavily populated areas. This effect is significant for cities struggling to meet stricter government air pollution limits.
Researchers discovered that bright light from sports stadiums and urban street lights can boost daytime ozone levels, a key air pollutant in many areas. Cities may need to consider the unexpected effects of night-time lighting on air quality.
Researchers at Kyoto University have developed a porous framework that can capture common air pollutants and emit glowing colors when exposed to ultraviolet light. This breakthrough enables the creation of portable, solid-state pollution detectors with potential applications in medicine, pharmaceuticals, and industry.
Permanent night lighting affects songbirds' reproductive behavior, with males singing earlier and females laying eggs up to 1.5 days sooner in artificial light environments. This can lead to maladaptive mate-choice decisions, potentially impacting survival and fitness.
Research shows that artificial night lighting impacts dawn song in forest-breeding songbirds, causing them to sing earlier and females to lay eggs a day and half earlier. This can lead to lower-quality offspring, as females may mate with lesser males.
Researchers discovered how bacteria convert methylmercury into a less-toxic form, a trait that lets them survive in mercury-rich environments. Understanding this mechanism may be a viable way to combat methylmercury pollution.
Air pollution in eastern China has reduced the amount of light rainfall and decreased days of light rain by 23 percent, affecting crop growth and health. Researchers found that smaller water droplets created by aerosols impede rain cloud formation.
Research reveals that street lights disrupt the navigation and flight patterns of slow-flying woodland bats, causing them to stray from their preferred routes and face increased predation risk. The study highlights the importance of adopting species-specific approaches to understanding the consequences of artificial light pollution.
Case Western Reserve researchers are investigating the physical and chemical consequences of sunlight absorption by toxic nitro-aromatic pollutants in the environment. The goal is to understand how these compounds transform into more harmful products and predict their environmental fate.
A recent study published in Frontiers in Ecology and the Environment reveals that polarized light pollution can trigger animal behaviors leading to injury and death. Artificial light sources can attract or repulse animals, causing them to migrate incorrectly, choose poor nesting sites, or become trapped by reflective surfaces.
A new global measure of coral reef health has been developed using light pollution index, revealing the impact of human activity on ocean health. The study found that coral reefs near urban areas, gas flares, and fishing boat activity have higher stress levels.
Researchers found that light trucks, including SUVs and minivans, produced 0.5-0.6% more toxic air pollutants than conventional cars in a downtown Baltimore parking garage. The study provides new insights into the health risks of vehicle-related air pollution in urban settings.
Research shows that older mothers produce faster-growing and more resilient larvae, while smaller ants disrupt native seed dispersal patterns. Exotic plants also adapt quickly to new environments, and artificial night lighting can harm migrating birds.
Researchers studied coral outbreaks off the island of Curacao, finding high concentrations of metals and human pathogens near major oil refineries. The team suggests that environmental stresses caused by pollution may be weakening corals' resistance to bacterial infection.
University at Buffalo chemists found that nitric oxide is highly reactive with ethanol, making it a potentially more insidious pollutant. The study's findings provide new insights into how solvation affects chemical reactions and could help scientists better tailor lab experiments.
Ground-level ozone levels are high enough to reduce growth and yield of sensitive plants on Long Island, where important agriculture is located. White clover has been particularly affected, with a 24-27% reduction in growth rate.
New research suggests that aerosol pollutants in the atmosphere are likely masking global warming. Aerosols can modify clouds, suppress precipitation, and reflect light, cooling the Earth. This effect may be as large as the warming caused by human emissions of greenhouse gases.
Researchers at Purdue University have developed a method to measure pollutants produced by combustion, using laser-induced fluorescence. This technique has the potential to significantly reduce nitric oxide production in next-generation jet engines, designed for lean direct injection.