Yet whereas petrostates such as Nigeria and Angola have ploughed money into industrial white elephants, Botswana has invested in future sources of wealth, including education and infrastructure.

然而，当尼日利亚和安哥拉等石油国家将资金投入到无用的工业项目时，博茨瓦纳却投资于来的财富来源，包括教育和基础设施建设。

Although Germany is one of the most energy-efficient countries in Europe—meaning waste is low—it consumes enormous amounts of energy owing to its large industrial base (see chart 4).

尽管德国是欧洲能效最高的国家之一（这意味着浪），但由于其庞大的工业基础，它消耗了大量的能源（见图 4）。