Describe characteristics of coal ?
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ᴄᴏᴀʟ ɪs ᴍᴏsᴛʟʏ ᴄᴀʀʙᴏɴ ᴡɪᴛʜ ᴠᴀʀɪᴀʙʟᴇ ᴀᴍᴏᴜɴᴛs ᴏғ ᴏᴛʜᴇʀ ᴇʟᴇᴍᴇɴᴛs; ᴄʜɪᴇғʟʏ ʜʏᴅʀᴏɢᴇɴ, sᴜʟғᴜʀ, ᴏxʏɢᴇɴ, ᴀɴᴅ ɴɪᴛʀᴏɢᴇɴ. ᴄᴏᴀʟ ɪs ғᴏʀᴍᴇᴅ ᴡʜᴇɴ ᴅᴇᴀᴅ ᴘʟᴀɴᴛ ᴍᴀᴛᴛᴇʀ ᴅᴇᴄᴀʏs ɪɴᴛᴏ ᴘᴇᴀᴛ ᴀɴᴅ ɪs ᴄᴏɴᴠᴇʀᴛᴇᴅ ɪɴᴛᴏ ᴄᴏᴀʟ ʙʏ ᴛʜᴇ ʜᴇᴀᴛ ᴀɴᴅ ᴘʀᴇssᴜʀᴇ ᴏғ ᴅᴇᴇᴘ ʙᴜʀɪᴀʟ ᴏᴠᴇʀ ᴍɪʟʟɪᴏɴs ᴏғ ʏᴇᴀʀs.
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Coal is mostly carbon with variable amounts of other elements; chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.
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