With a revival of Tennessee Williams' first full-length play (about Alabama coal miners) under their belt, an extraordinary Brooklyn-based theatre group--New Mummer Theatre Collective--has just announced their plans to turn New York City's theatre district truly green.

They want to take Off-Broadway, off coal--at least, off mountaintop removal coal.

Last fall, the New York City theatre community launched a remarkable industry-wide initiative, Broadway Goes Green, to "reduce Broadway's carbon footprint, adopt environmentally sustainable practices...