Artificial lights at the wrong time or place that fall out of standard and harm the environment and the night sky with unfavorable quality are called light pollution.
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Light pollution causes excessive growth of plants and disrupts their budding and photosynthesis.
209a53db-a146-4d5f-afb3-6b2dbae7d342
Failure to comply with lighting standards in urban areas, especially the lighting of trees with artificial light, disrupts the internal mechanism of these plants and causes their gradual death.
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Light pollution affects the migration of birds and the departure of baby turtles to the sea and causes disturbances in their orientation.
Light pollution causes some insects and fish to be easily hunted.
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209a53db-a146-4d5f-afb3-6b2dbae7d342
Too much light at night leads to skin cancers, disrupting biological cycles such as menstrual periods in women.
If a person is not in absolute darkness at night, which is the time to sleep and rest, the hormone "melatonin" which is secreted only at night and is responsible for regulating the body's biological clock, will not be secreted.
e27e3f7f-70f3-4efb-a2e6-fef5ce416959
Among the factors causing light pollution, we can refer to the lights of urban roads, light emitted from high-rise buildings, and advertising billboards with projectors from the bottom up.
e27e3f7f-70f3-4efb-a2e6-fef5ce416959
When the light rays of a lamp are not pointed straight towards the ground and a part of it goes to the sky.
due to incorrect installation or the use of a prismatic bubble
, it causes the night sky to glow and damage the environment.
The light dome above cities is called skyglow.
The skyglow is better seen when it is far from cities.
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Some of the ways to deal with light pollution are: correct direction of light rays, appropriate amount of light, installation of shaders on lighting sources, installation of photocells, installation of motion sensors, minimal and limited use of light sources, especially in sensitive areas such as coastal spotlights and creating awareness among people.
209a53db-a146-4d5f-afb3-6b2dbae7d342
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Reports indicate that some birds have left Tehran due to the increase in light pollution, and migratory birds, especially migratory sparrows, no longer enter Tehran; also, rare birds of the Alborz ranges such as golden eagle and huma are being seen less often in Tehran.
4bf2738a-1f59-4fd1-9921-6a2eb8fb1be2
In addition to light pollution on Earth, the reflection of sunlight from Starlink satellites has recently caused light pollution and disruption in stargazing by astronomers.
The private space company SpaceX has announced that in order to solve this problem, it will install a shade on its satellites to prevent the sunlight from reflecting on them.
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Warning: these questons and answers are not all representative of the way questions will be asked and answered in the pilot, because some questions are compound and some answers do not include citations.

Q: What is light pollution?
A: Artificial lights at the wrong time or place that fall out of standard and harm the environment and the night sky with unfavorable quality are called light pollution. [209a53db-a146-4d5f-afb3-6b2dbae7d342]

Q: What damages does light pollution inflict on plants?
A: It causes excessive growth and disrupts photosynthesis. [209a53db-a146-4d5f-afb3-6b2dbae7d342]

Q: What does lighting the trees cause?
A: It disrupts the internal mechanism of these plants and causes their gradual death. [4bf2738a-1f59-4fd1-9921-6a2eb8fb1be2]

Q: How does light pollution affect birds?
A: It affects the migration of birds and causes disturbances in their orientation. [e27e3f7f-70f3-4efb-a2e6-fef5ce416959, 74446dfc-03c1-4ff8-a037-00695bb932be, 209a53db-a146-4d5f-afb3-6b2dbae7d342]

Q: How does light pollution affect baby turtles?
A: It causes baby turtles to lose their way after hatching and instead of going toward the sea, go toward the city lights. [e27e3f7f-70f3-4efb-a2e6-fef5ce416959, 74446dfc-03c1-4ff8-a037-00695bb932be, 209a53db-a146-4d5f-afb3-6b2dbae7d342]

Q: Secretion of which hormone is disrupted by light pollution?
A: Melatonin. [e27e3f7f-70f3-4efb-a2e6-fef5ce416959]

Q: What undesirable impact does light pollution have on women?
A: It disrupts biological cycles such as menstrual periods in women. [e27e3f7f-70f3-4efb-a2e6-fef5ce416959]

Q: What are the sources of light pollution in cities?
A: Lights of urban roads, light emitted from high-rise buildings, and advertising billboards with projectors from the bottom up. [e27e3f7f-70f3-4efb-a2e6-fef5ce416959]

Q: What do we call the light dome caused by too many lights in cities?
A: The light dome above cities is called skyglow. [642fb7ea-8dc5-488a-8279-099e1eb60f42]

Q: What is a way of dealing with light pollution?
A: Correct direction of light rays (toward ground rather than sky). [209a53db-a146-4d5f-afb3-6b2dbae7d342, 4bf2738a-1f59-4fd1-9921-6a2eb8fb1be2, 42915651-8548-4930-a9c6-e748ba678bfe]

Q: What is a way of dealing with light pollution?
A: Appropriate amount of light. [209a53db-a146-4d5f-afb3-6b2dbae7d342, 4bf2738a-1f59-4fd1-9921-6a2eb8fb1be2, 42915651-8548-4930-a9c6-e748ba678bfe]

Q: What is a way of dealing with light pollution?
A: Installation of shaders on lighting sources. [209a53db-a146-4d5f-afb3-6b2dbae7d342, 4bf2738a-1f59-4fd1-9921-6a2eb8fb1be2, 42915651-8548-4930-a9c6-e748ba678bfe]

Q: What is a way of dealing with light pollution?
A: Installation of motion sensors. [209a53db-a146-4d5f-afb3-6b2dbae7d342, 4bf2738a-1f59-4fd1-9921-6a2eb8fb1be2, 42915651-8548-4930-a9c6-e748ba678bfe]

Q: What is a way of dealing with light pollution?
A: Minimal and limited use of light sources, when possible, as in coastal spotlights. [209a53db-a146-4d5f-afb3-6b2dbae7d342, 4bf2738a-1f59-4fd1-9921-6a2eb8fb1be2, 42915651-8548-4930-a9c6-e748ba678bfe]

Q: What is a way of dealing with light pollution?
A: Creating awareness among people. [209a53db-a146-4d5f-afb3-6b2dbae7d342, 4bf2738a-1f59-4fd1-9921-6a2eb8fb1be2, 42915651-8548-4930-a9c6-e748ba678bfe]

Q: Which birds have left Tehran due to light pollution?
A: Migratory sparrows, golden eagles. [4bf2738a-1f59-4fd1-9921-6a2eb8fb1be2]

Q: What is a source of light pollution outside the atmosphere of earth?
A: The reflection of sunlight from Starlink satellites. [0f4aba4c-4b18-4a4c-b618-82d304dd7092]

Q: Has Starlink done anything to address the light pollution issue from their satellites?
A: It has announced that in order to solve this problem, it will install a shade on its satellites to prevent the sunlight from reflecting on them. [0f4aba4c-4b18-4a4c-b618-82d304dd7092]