Light pollution-A cause of eye diseases
In my
blogs, I talked about several different pollution which are air pollution,
visual pollution and E-waste. And in this blog, I want to talk about the other
pollution which is called light pollution. According to Wikipedia, the light
pollution also known as photopollution or luminous pollution, is excessive,
misdirected, or obtrusive artificial light. Pollution is the adding -of/ added
light itself, in analogy to added sound, carbon dioxide, etc.
Light pollution compares with starlight in the night sky for residents, interferes with astronomical observatories, and like any other form of pollution, disrupts ecosystems and has adverse health effects, and the pollution can be divided into to major categories:
- Unpleasant
light that intrudes on an otherwise natural or low-light setting
- Excessive
light (generally means indoors' lights) that leads to discomfort and
adverse health effects
The
consequences of this kind of issue can be seen as the following:
- Energy
waste
- Effects
on animal and human health and psychology
- Disruption
of ecosystem
- Effect
on astronomy
- Increase
in atmospheric pollution
- Reduction
of natural sky polarization
The
reduction of this issue includes many things such as reducing sky glow,
reducing glare, reducing light trespass, and reducing clutter. And some
possible solutions include (Wikipedia):
1.
Utilizing light sources of
minimum intensity necessary to
accomplish the light's purpose
2.
Turning
lights off using a timer or occupancy sensor or manually when not needed
3.
Improving
lighting fixtures, so that they direct their light more accurately towards
where it is needed, and with fewer side effects
4.
Adjusting
the type of lights used, so that the light waves emitted are
those that are less likely to cause severe light pollution problems. Mercury,
metal halide and above all first generation of blue-light LED road luminaires
are much more pollutant than sodium lamps: Earth atmosphere scatters and
transmits blue light better than yellow or red light. It is a common experience
observing "glare" and "fog" around and below LED road
luminaires as soon as air humidity increases, while orange sodium lamp luminaires
are less prone to show this phenomenon
5.
Evaluating
existing lighting plans, and re-designing some or all of the plans depending on
whether existing light is actually needed
I hope
that we can mitigate this kind of issue and help to protect our planet to let
we human beings live in a beautiful and environmental friendly earth.
Picture from the following website:
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