耕地和传统的耕作制度破坏了地球上原有的植被状况和气候环境，促进了北方地区干旱和荒漠化的不断扩张与蔓延。
The traditional cultivation of land and farming methods cause great damage to the vegetation and environments, which also quicken the pace of drought and desertification in North China.
豪称，由塞缪尔·莫尔斯研发的电报促进了一些商品的长途交易，比如在南方各州生产的棉花可以运销到北方及欧洲。
Howe says the telegraph, developed by Samuel Morse, promoted long-distance trade in commodities such as cotton, which was grown in the southern states and shipped to the north and Europe.
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