3 A B C D E F G H I J K L M N O P Q R S T U V W Y

Shale Gas Extraction

Shale gas extraction is the process of extracting natural gas from geological rock formations known as shale. In the 20th century, shale gas extraction was not profitable. In the 21st century, fracking, new horizontal drilling technologies, and new extraction methods, coupled with higher energy costs, have together made shale gas extraction a reasonable commercial proposition.