问题：
How does India successfully light up the entire country at night while China doesn't?
为啥印度能在夜间点亮全国，中国却没有？
问题描述：
这是印度的夜间灯光图：
这是中国的：
为什么印度能在全国提供电力，中国的电力供应却大部分集中在东部呢？
回答：
印方辩友
Shashank Kumar：
Because the image is afake.
因为图是假的。
This Is not India at night. The image is actually as old as 2003 and was created by National Oceanic and Atmospheric Administration (NOAA) scientist Chris Elvidge, to highlight population growth over time.
这不是印度的夜间灯光图像。这张图是2003年的，是国家海洋和大气管理局（NOAA）的科学家克里斯·埃尔维奇绘制的，用来突显人口随时间的增长。
As NASA's Earth Observatory says , it's a colour-composite image created from satellite photos over time; white areas show city lights that were visible prior to 1992, while blue, green, and red shades indicate city lights that became visible in 1992, 1998, and 2003 respectively. There are several versions of this image.
就像NASA的地球天文台说的，这是不同时段的卫星图像经过彩色合成的图片。白色的区域表示1992年前的城市灯光，蓝色，绿色，和红色部分分别表示1992,1998和2003年的城市灯光。关于这张图还有好多不同版本的。
Just think why would Kashmir region be more lit while the central India which is much more developed so sparsely lit.
只要想想为啥克什米尔地区为啥那么亮，而发达的印度中部亮点却相对稀疏。
This image is gose viral every diwali(a festival of lights) in India too. But it has been debunked time and time. According to NASA “In reality, any extra light produced during Diwali is so subtle that it is likely imperceptible when observed from space,”
这张图在每年印度排灯节的时候也是刷屏刷的跟中病毒似的，不过已经被辟谣了，NASA说排灯节增加的那点儿额外灯光太微弱了，根本不能从太空观察到。
我方辩友
Colin Mao：
According to NASA’s 2010 photos, we can see that China is not entirely lit up. The lights are mostly gathered along the ocean and in big cities.
上图是NASA 2010年的图像，我们能看到中国没有全境点亮。灯光主要集中在沿海和大城市地区。
There are several reasons for this:
原因如下：
·The population density in those north-west areas are far less than in south-east areas.
·西北地区的人口密度远低于东南地区。
·The geographic problem: There are mountains and plateaus in north-west China, which makes transport of electricity to those areas difficult.
·地理方面：中国西北部多山，以高原为主，这增加了电力输送的难度。
·And as for the cost, due to low population density, it would be a waste of money to set up electrical lines for them since only a few people are using electricity in those areas.
·由此，因为人口密度低，用的人少，在这些地方铺设电网显然是不划算的。
（在这里要补充一下哈，这个回答有一点误导性，政府没有抛弃这些地区，截止2015年12月23日，我国已实现全国电力全面覆盖。）
·I think the most important reason is that India has almost thesamepopulation as China while it only has1/3 of China’s size.
·至于印度，我觉得主要是它有和中国差不多的人口数，国土面积却只有中国的三分之一。
Chinese big cities are all well-developed and their electric systems are too. So don’t worry about it.
中国的大城市已经很发达了，电力系统也是这样，所以没啥可担心的。
Young Zhang：
The yellow line in this map is called Hu Line, The latest data(2015) showed
图中的黄线是胡焕庸线。根据2015的最新数据显示，
57% of the area, but only 6% of the population in the orange area
橘黄色的区域占国土面积的57%，人口总量却只有6%。
43% of the area, but 94% of the population in the red area
红色区域占国土面积的43%，人口数却高达总人口的94%。
This line in your picture is like this:
这条线表现在灯光图中就是这样的：
还有其他答主晒出了全球电力供应图，中国的电力供应是印度的五倍，侧面佐证了这张夜间灯光图更多的受地势和人口的影响，不能作为经济发展程度对比的证据。
胡焕庸线
下面是知识点，知识点，知识点哈~
胡焕庸线
即我国著名地理学家胡焕庸（1901-1998）在1935年提出的划分我国人口密度的对比线，线两侧是两个迥然不同自然和人文地域。
胡焕庸先生
胡焕庸线又可以看做什么线，
我国的城镇化水平分割线，
气象上的降雨线，
地貌区域分割线，
文化转换的分割线，
民族界线
。。。
事实上，时至今日，胡焕庸线背后揭示的国情人口仍值得给予充分重视，也是地学研究中重要的课题。再次对胡老先生表示崇高的敬意！
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