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Surface mining of coal
• Surface mining of coal was started around 1900 in China -
Period: to
Surface coal mining methods used in China from 1949 to 1980
Surface coal mining methods used in China from 1949 to 1980 were mostly open pit method to excavate steeply buried pitching seams -
China's pollution problem
A Chinese mayor said “In the 1970s we emphasized ‘farmland development’ and in the 1980s we placed our priority on ‘factory development’. Now in the 1990s we have made great advances in ‘city development.’” large amounts of coal were burned to keep citizens warm -
Threee gorges dam
The project was approved by the Chinese government in 1992. However, construction didn't begin until 1994. -
Rice cultivation in Africa
Rice cultivation became common in West Africa by the end of the 17th century
