U.S. Coal Distribution

Between 1980 and 2000, U.S. coal mining productivity increased at an average rate of 6.6% per
year, from 1.93 to 6.99 short tons per miner per hour. The major factors underlying these gains
were interfuel price competition, structural change in the industry, and technological improvements in coal mining. Between 2000 and 2013, however, growth in overall U.S. coal mining productivity has
been negative, declining at a rate of 1.8% per year to 5.54 short tons per miner-hour in 2013. By region, productivity in all but one (Alaska/Washington) of the coal producing basins has declined from its productivity level in 2000. In the Central Appalachian coal basin, which has been mined extensively, productivity declined by 50% between 20 00 and 2013, corresponding to an average decline of 5. 2% per year. While productivity declines have been more moderate at the highly productive mines in Wyoming’s Powder River Basin, coal mining productivity in this region still fell by 30% between 2000 and 2013 corresponding to an average rate of decline of 2.7% per year. Of the top coal producing regions showing declines, the Eastern Interior has shown the best overall performance, with coal mining productivity declining by only 2.7% between 2000 and 2013, or 0.2% per year. The Eastern Interior region, which has a substantial amount of thick, underground-minable coal reserves, is currently experiencing a resurgence in coal mining activity, with several coal companies either opening or in the process of opening new, highly productive longwall mines.

Via www.eia.gov

This post may contain affiliate links. As an Amazon Associate, I earn from qualifying purchases.

Comments

Find cities with similar climate

This map has been created using The Global environmental stratification. The Global environmental stratification (GEnS), based on statistical clustering of bioclimate data (WorldClim). GEnS, consists of 125 strata, which have been aggregated into 18 global environmental zones (labeled A to R) based on the dendrogram. Interactive map >> Via www.vividmaps.com Related posts: - Find cities with similar climate 2050 - How global warming will impact 6000+ cities around the world?

The Appalachian Mountains, the Scottish Highlands, and the Atlas Mounts in Africa were the same mountain range

The Central Pangean Mountains was a prominent mountain ridge in the central part of the supercontinent Pangaea that extends across the continent from northeast to southwest through the Carboniferous , Permian Triassic periods. The mountains were formed due to a collision within the supercontinents Gondwana and Laurussia during the creation of Pangaea. It was comparable to the present Himalayas at its highest peak during the start of the Permian period. It isn’t easy to assume now that once upon a time that the Scottish Highlands, The Appalachian Mountains, the Ouachita Mountain Range, and the Atlas Mountains in northwestern Africa are the same mountains , once connected as the Central Pangean Mountains.

Human Emotions Visualized

Despite significant diversity in the culture around the globe, humanity's DNA is 99.9 percent alike. There are some characteristics more primary and typical to the human experience than our emotions. Of course, the large spectrum of emotions we can feel can be challenging to verbalize. That's where this splendid visualization by the Junto Institute comes in. This visualization is the newest in an ongoing attempt to categorize the full range of emotions logically. Our knowledge has come a long route since William James suggested 4 primary emotions: fear, grief, love, and rage. These kernel emotions yet form much of the basis for current frameworks. The Junto Institute's visualization above classifies 6 basic emotions: fear, anger, sadness, surprise, joy, love More nuanced descriptions begin from these 6 primary emotions, such as jealousy as a subset of anger and awe-struck as a subset of surprise. As a result, there are 102 second-and third-order emotions placed on this emo

Ecoclimax

Search This Blog