During the Victorian era, industrial air pollution tended to be worse in the east and south east of London because of the prevailing westerly wind, with the result that the East End was settled more by the working classes, while the western part of the city was home to higher social classes
प्राचीन भारतामध्ये मध्य-पूर्वेकडील भागांमध्ये गुप्त लिपीसमवेत नागरी लिपीचा वापर रूढ झाल्याचे दिसून येते, कारण पश्चिमेकडे शारदा लिपी तर अति-पूर्वेकडे सिद्धम लिपी अधिक प्रमाणात वापरात होती.