What are the mysterious light sources on light pollution maps? (altairspace.com)

Article summary

The article discusses mysterious light sources on light pollution maps, which are often not from cities or urban areas, but from other sources such as greenhouses, oil fields, and volcanoes. The author uses examples from Maine, North Dakota, and Hawaii to illustrate these unusual light sources. Light pollution maps can be useful tools for environmental scientists, economists, and others. They can help track wildfires, estimate GDP, and detect undisclosed industrial facilities.

Main themes

• light pollution
• dark skies
• LED streetlights
• greenhouse farming
• oil fields
• environmental impact
• astronomy and stargazing

What commenters say

• Some commenters suggest that light pollution maps can be counterproductive because they attract visitors who may not be considerate of dark skies.
• The replacement of traditional streetlights with LEDs can increase light pollution in some areas.
• Others note that certain regions, such as northern Sweden and parts of the US, still have areas with very low light pollution.
• The use of LEDs in streetlights is seen as a positive development by some, while others point out potential drawbacks, such as increased reflection and disruption to nocturnal wildlife.
• Some commenters share their personal experiences and observations of light pollution in different parts of the world.
• There is a discussion about the impact of human activities, such as mining and greenhouse farming, on light pollution.
• A few commenters mention the beauty of dark skies and the importance of preserving them.
• The issue of light pollution is complex and multifaceted, with different perspectives and opinions on its causes and consequences.