information about Coal field
Field Hierarchy
| Parent | |||
|---|---|---|---|
Chemistry 29.4M papers | Engineering 25.5M papers | Geography 13.3M papers | Organic chemistry 13.1M papers |
History 8.1M papers | Archaeology 7M papers | Waste management 1.6M papers | |
| Current | |||
Coal 292k papers | |||
| Child | |||
Coal mining 95.2k papers | Char 35k papers | Coal combustion products 16.5k papers | Fluidized bed combustion 12k papers |
Energy source 11.5k papers | Pulverized coal-fired boiler 11k papers | Wood gas generator 10.1k papers | Coal gasification 8,988 papers |
Bituminous coal 7,843 papers | Bottom ash 7,841 papers | ||
Trends
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History