Knoema数据库中关于趋势行业，政治和社会经济主题的快速数据摘要和可视化。World Trade Uncertainty Weighing On Global Growth China: Is Pork a Barrier to Economic Stimulus? US Purchasing Managers Index Falls Below 50, Signals Contraction 了解更多
An estimate of coal reserves, based on a demonstrated reserve base, adjusted for assumed accessibility and recovery factors, and does not include any specific economic feasibility criteria. In the United States, coals are classified by rank progressively from lignite (least carbonaceous) to anthracite (most carbonaceous) based on the proximate analyses of various properties (fixed carbon, volatile matter, heating value, and agglomerating character), following methods prescribed by the American Society for Testing and Materials. The International Coal Classification of the Economic Commission for Europe recognizes two broad categories of coal, “brown coal” and “hard coal.” In terms of U.S. coal classification, the international classification of brown coal includes lignite and lower-ranked subbituminous coal, whereas hard coal includes all higher rank coals.
The Energy Data Brief offers key statistics designed to help energy market watchers anticipate and respond to developments in the energy sector as well as changes in related industries and investments.