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UPSC GEOGRAPHY
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This channel provides notes from different major books like D.R. khullar, G.C leong etc No copyright material allowed. Queries - @Upscgeographybot
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Channel UPSC GEOGRAPHY (@upsc_geography_notes_optional) in the English language segment is an active participant. Currently, the community unites 67 144 subscribers, ranking 2 444 in the Education category and 4 960 in the India region.
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Since its creation on Π½Π΅Π²ΡΠ΄ΠΎΠΌΠΎ, the project has demonstrated rapid growth, gathering an audience of 67 144 subscribers.
According to the latest data from 24 June, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by -1 073 over the last 30 days and by -53 over the last 24 hours, overall reach remains high.
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- Post reach: On average, each post receives 2 109 views. Within the first day, a publication typically gains 2 175 views.
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The author describes the resource as a platform for expressing subjective opinions:
βThis channel provides notes from different major books like D.R. khullar, G.C leong etc
No copyright material allowed.
Queries - @Upscgeographybotβ
Thanks to the high frequency of updates (latest data received on 25 June, 2026), the channel maintains relevance and a high level of publication reach. Analytics show that the audience actively interacts with content, making it an important point of influence in the Education category.
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Repost from UPSC GEOGRAPHY
β CLASSIFICATION OF COAL.
2. LIGNITE (Brown coal)
β Contains 40 to 55 per cent carbon.
β Moisture content is high (over 35 per cent).
β It undergoes spontaneous combustion (this is undesirable because it creates fire accidents in mines).
67 144
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67 144
β CLASSIFICATION OF COAL.
2. LIGNITE (Brown coal)
β Contains 40 to 55 per cent carbon.
β Moisture content is high (over 35 per cent).
β It undergoes spontaneous combustion (this is undesirable because it creates fire accidents in mines).
67 144
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β CLASSIFICATION OF COAL.
1. PEAT
β Contains less than 40 to 55 per cent carbon (has more impurities).
β Contains sufficient volatile matter and lots of moisture (gives out a lot of smoke when burnt cause pollution).
β Left to itself, it burns like wood, gives less heat, emits more smoke and leaves a lot of ash.
67 144
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β STAGES OF COAL FORMATION.
#Economicgeography
β In the process of transformation (coalification),
1. Buried plants turn into peat,
2. Peat is altered to lignite,
3. lignite is altered to sub-bituminous,
4. sub-bituminous coal is altered to bituminous coal, and
5. bituminous coal is altered to anthracite (oldest, best quality coal).
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67 144
β FORMATION OF COAL.
#Economicgeography
β Most of the worldβs coal was formed in Carboniferous age (350 million years ago.)
β Name Carboniferous refers to coal-bearing strata.
β Coal formed millions of years ago when the earth was covered with huge swampy (marshy) forests.
β As plants grew, some died and fell into the swamp waters.
β New plants grew up to take their places and when these died more grew.
β In time, there was thick layer of dead plants rotting in the swamp.
β Surface of the earth changed, and water and dirt washed in, stopping the decaying process.
β More plants grew up, but they too died and fell, forming separate layers.
β After millions of years many layers had formed, one on top of the other.
β Weight of the top layers and the water and dirt packed down the lower layers of plant matter.
β Heat and pressure produced chemical and physical changes in the plant layers which forced out oxygen and left rich carbon deposits. In time, material that had been plants became coal.
