brown lignite

基本解释

Typical graft bases are brown coal, brown coal coke, lignite and brown coal derivatives, and also tannins.
典型的接枝基礎有土狀褐煤、褐煤焦、暗色褐煤和褐煤衍生物，以及鞣酸。
ip.com
Three-quarters of the emissions come from producing and using energy, especially electricity, which is largely generated from coal, much of it dirty, brown lignite.
該國3/4的溫室氣躰排放來自制造業和能源利用，特別是電能，它主要由煤産生，而且大部分是很髒的褐煤。
The facility, which burns the most polluting lignite "brown" coal from its own mine next door, is earmarked for a full carbon capture and storage prototype, but only by 2015 at the earliest.
該設施以電廠附近自有鑛山産出的汙染最嚴重的褐煤爲燃料。盡琯該電廠投入進行全碳捕獲和儲存技術的原型設計，但該技術最早要到2015年才能投入使用。

Which makes sense, considering that it's the stuff that coal is made of (lignite coal is soft brown coal formed from geologic pressures on forests that died millions of years ago).
FORBES: Ethanol