Abstract:
Bangladesh, a land of vibrant culture and lush landscapes, faces a growing threat in the form of
light pollution. As cities like Dhaka expand and economic activity intensifies, the night sky is
increasingly dominated by a glare of artificial light. This excess illumination not only disrupts the
natural rhythm of life, but also poses environmental and health risks. The extent of the problem is
alarming. Studies suggest that over 25% of Bangladesh's land area is now light polluted, a
significant increase from just a decade ago. This light trespass disrupts the natural darkness crucial
for nocturnal animals, impacting their migration, foraging, and reproduction. Bats, owls, and
fireflies, all vital parts of the ecosystem, are losing their navigational cues due to the artificial glow.
The consequences for humans are equally concerning. Excessive exposure to light at night can
disrupt sleep patterns, leading to insomnia, fatigue, and even hormonal imbalances. It can also
suppress the production of melanin, a hormone essential for regulating the body's circadian
rhythm and immune function. Additionally, light pollution contributes to urban heat island effects,
raising temperatures in cities and exacerbating air pollution.
