(A) The overall scale of the Earth at night image is global.
(B) Two patterns visible on the map are the concentration of light in the northern hemisphere, particularly in Europe and North America, and the bright cluster of lights around the Indian subcontinent.
(C) The Earth at night image is considered a qualitative source because it does not provide any quantitative data. Instead, it illustrates the concentration of human activity in an area based on visual cues such as the intensity of light.
(D) One reason why eastern China is brighter than western China is because eastern China is more densely populated and has a higher concentration of cities and towns.
(E) One economic impact of so many people living on the coasts of the world's continents is that it provides access to resources such as ports, which can facilitate trade and international commerce.
(F) One environmental impact of so many people living on the coasts is increased pollution due to the concentration of industrial activity and population density.
(G) A major limitation of using the Earth at night image to illustrate the location of the world's population is that it does not take into account the population distribution in rural or remote areas.