The consequence of techniques such as these is that an ever-larger proportion of sewage is being used as a raw material for energy generation.

通过诸如上述的这些技术，越来越多的废弃物能够作为能源生产的原材料。

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The guitars, however, sound as raw and vital as ever.

NPR: Sonic Youth: The First Quarter-Century

The environmental result is that the value chain sucks ever more raw materials through as fast as possible, swallowing up huge volumes of timber, steel, plastic and energy in the process.

FORBES: Sustainable Consumption Rising on the Business Agenda