Rare earth elements from 4 square kilometers of such areas could meet Japan's annual demand of about 30, 000 tons.
上述区域内每4平方公里范围的稀土元素储量,即可满足日本每年约30000吨的需求。
Rare earth magnets are already a necessity in many hybrid car batteries, so heat-capture devices made of the new multiferroic compound could be placed near the magnets.