brown lignite

基本解释

Typical graft bases are brown coal, brown coal coke, lignite and brown coal derivatives, and also tannins.
典型的接枝基础有土状褐煤、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.
该国3/4的温室气体排放来自制造业和能源利用，特别是电能，它主要由煤产生，而且大部分是很脏的褐煤。
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.
该设施以电厂附近自有矿山产出的污染最严重的褐煤为燃料。尽管该电厂投入进行全碳捕获和储存技术的原型设计，但该技术最早要到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