The eastern sides of English cities tend to be poorer. This pattern can be traced back to the Industrial Revolution, when winds blew pollution east, causing the rich to flee west.
from /r/dataisbeautiful
英國城市的東邊往往更窮。這種模式可以追溯到工業革命時期，當時的風把污染吹到了東部，導致富人向西逃亡。