by Valeria Moreno Lopez, age 16
Human activity has been a continuous danger to the environment and all living things. Right now, mounting research has put the spotlight on light pollution – the unrestrained and unnecessary use of artificial light. This type of pollution affects more than 80% of the world's population, with Singapore taking the lead.
Scientists have reported four main types of light pollution: sky glow, clutter, light trespass, and glare. Sky glow is the excessive brightness of the urban night sky caused by streetlamps, car lights, and factories. Living with high levels of this type of pollution makes it difficult to see stars at night, as it redirects their light and can obstruct the views of stars for astronomers and observers. Clutter is the unnatural grouping of lights, which are normally bright billboards and flashy tourist attractions. Since moonlight leads animals to their migration patterns, this often confuses animals and causes them to stray from their normal patterns. Light trespassing is light that reaches into an undesired space; such as light from a streetlamp seeping into a bedroom window. Lastly, glare is light that can cause discomfort and annoyance while driving, walking, or doing other daily tasks.
Beyond everyday tasks, light pollution is detrimental to human health and behavior. Light trespass, in particular, can disturb sleep and melatonin production, which requires surroundings to be fully dark to work properly. If not, many health issues develop, including fatigue, anxiety, stress, and sleep deprivation. Blue light, found in cell phones, computers, and even in popular LED light bulbs, also exposes people to the same damaging threats. Furthermore, studies reveal lower melatonin production is linked to cancer. As a result of this study, the American Medical Association advocates to control light pollution and discover the additional risks of nocturnal light. [Read More]