information about Coal field
Field Hierarchy
| Parent | |||
|---|---|---|---|
Chemistry 29.4M papers | Engineering 25.6M papers | Geography 13.4M papers | Organic chemistry 13.1M papers |
History 8.1M papers | Archaeology 7M papers | Waste management 1.6M papers | |
| Current | |||
Coal 293k papers | |||
| Child | |||
Coal mining 95.4k papers | Char 35.1k papers | Coal combustion products 16.6k papers | Fluidized bed combustion 12k papers |
Energy source 11.6k papers | Pulverized coal-fired boiler 11k papers | Wood gas generator 10.1k papers | Coal gasification 9,001 papers |
Bottom ash 7,886 papers | Bituminous coal 7,854 papers | ||
Trends
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History