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• Select Coal

  1

  Coal

  Author:David E. NewtonFrom:The Gale Encyclopedia of Science (Vol. 2. 6^th ed.)

  20212,328 words Topic overview 1280LCoal is a naturally occurring combustible material consisting primarily of the element carbon but with low percentages of solid, liquid, and gaseous hydrocarbons and other materials, such as compounds of nitrogen and...
• Select Polycyclic Aromatic Hydrocarbons

  2

  Polycyclic Aromatic Hydrocarbons

  Editors:Katherine H. Nemeh and Jacqueline L. LongeFrom:The Gale Encyclopedia of Science (Vol. 6. 6^th ed.)

  2021506 words Topic overview 1410LPolycyclic aromatic hydrocarbons, or polynuclear aromatic hydrocarbons, are a family of hydrocarbons containing two or more closed aromatic ring structures, each based on the structure of benzene. The simplest of these...
• Select Carbon

  3

  Carbon

  Author:Robert L. WolkeFrom:The Gale Encyclopedia of Science (Vol. 2. 6^th ed.)

  20212,658 words Topic overview 1300LCarbon is the nonmetallic chemical element of atomic number 6 in group 14 of the periodic table. Its symbol is C, atomic weight 12.01, and specific gravity as graphite 2.25 and as diamond 3.51. Its stable isotopes are...
• Select U.S. Energy in the 21st Century: A Primer.

  4

  U.S. Energy in the 21st Century: A Primer.

  Authors:Melissa N. Diaz, Kelsi Bracmort, Phillip Brown, Richard J. Campbell, Corrie E. Clark, Mark Holt, et al.From:Congressional Research Service (CRS) Reports and Issue Briefs

  202117,264 words Report 1800LSince the start of the 21st century, the U.S. energy system has changed tremendously. Technological advances in energy production have driven changes in energy consumption, and the United States has moved from being a...
• Select U.S. energy: overview and key statistics

  5

  U.S. energy: overview and key statistics

  Authors:Michael Ratner and Carol GloverFrom:Congressional Research Service (CRS) Reports and Issue Briefs

  20147,153 words Report, Statistical ... 1420LJune 27, 2014 Summary Energy policy has been a recurring issue for Congress since the first major crises in the 1970s. As an aid in policymaking, this report presents a current and historical view of the supply...