This may be more pronounced, but this has been going on for at least 15 years and probably longer. I only say 15 years because that is how long I have been working with satellite imagery that easily shows these boundaries. They show up as obvious lines of light in nighttime visible satellite imagery.
This may be more pronounced, but this has been going on for at least 15 years and probably longer. I only say 15 years because that is how long I have been working with satellite imagery that easily shows these boundaries. They show up as obvious lines of light in nighttime visible satellite imagery.