1. The South America History
(1) Indians : The pioneer of South America.
The land ownership and feudal exploitation, the economic development was slow
British and Americans broke into South America, they set the countries as their places of raw material resources, goods dumping and capital output.
II. How is CBM formed
Coalbed methane (CH4) forms in one of two ways. During the earliest stage of coalification (the process that turns plant detritus into coal), biogenic methane is generated as a by-product of bacterial respiration. Aerobic bacteria (those that use oxygen in respiration) first metabolize any free oxygen left in the plant remains and the surrounding sediments. In fresh water
British English)와 미국영어(American English)는 어휘와 어법에 다소 차이가 있을 뿐 근본적 차이는 없으며 다만 정치적, 경제적, 문화적 또는 지리적인 측면에서 그 차이가 다소 있을 뿐이다. 우리 나라에 미국영어가 급속도로 보급된 이유는 2차대전 이후 한․미간의 유대관계가 긴밀했기 때문이다. 전세계