The cities will become richer sources of raw materials for metal than the mineral deposits in nature (urban mining).
The cities become richer sources of raw materials for metal than the mineral deposits in nature (urban mining).
The cities become richer sources of raw materials for metal than the mineral deposits in nature (urban mining).
この文を簡単にしてください: The cities will become richer sources of raw materials for metal than the mineral deposits in nature (urban mining). 出力: