valley fill n.— «Mountaintop removal is just what the name suggests. Peaks are cleared of trees. Giant steam shovels then scrape away the topsoil. The rock beneath is blasted away until the coal is exposed. Some blasts have lopped as much...
Nazi fuel n.— «This expensive coal-to-liquid process was later used by South Africa to meet its energy needs during its isolation under apartheid. And now what some people refer to as “Nazi fuel” is back—thanks in part to high oil prices...