15. A. What are fuels? Name any two common fuels.
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ɪᴍᴘᴏʀᴛᴀɴᴛ ғᴜᴇʟs ᴜsᴇᴅ ɪɴ ᴇᴠᴇʀʏᴅᴀʏ ʟɪғᴇ ɪɴᴄʟᴜᴅᴇ ɢᴀsᴏʟɪɴᴇ, ᴄᴏᴀʟ, ɴᴀᴛᴜʀᴀʟ ɢᴀs ᴀɴᴅ ᴅɪᴇsᴇʟ ғᴜᴇʟ.
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There are three types of fossil fuels which can all be used for energy provision; coal, oil and natural gas. Coal is a solid fossil fuel formed over millions of years by decay of land vegetation.
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