By 3,000 years ago the technique had spread south into Indochina and west to the Ganges River Valley in India, further increasing methane emissions.
By 3,000 years ago the technique had spread south into Indochina and west to the Ganges River Valley in India, further increasing methane emissions.
到了3000年前，此一技术扩展到中南半岛，西至印度的恒河流域，更增加了甲烷释放量。