窑炉需要使用大量的能源，在很多情况下，它是陶瓷工厂里最大的污染源。
The kiln is an obvious heavy user of energy and in many cases one of the biggest sources of pollution in a ceramics factory.
他们在旨在改变能源使用和节约方式的项目上投入了大量资金。
They have invested heavily in projects designed to change the way of using and conserving energy.
一些专家认为，打印机可以使用大量的可再生能源，比如用草来替代常见的成分。
Some experts believe printers could use plentiful renewable sources like grass to replace the familiar ingredients.
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