A black or brownish-black sedimentary rock used primarily as fuel in electricity generation. During Industrial Revolution it was vital for powering steam engines, trains, and ships.
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Industrial Revolution: A period from 18th to 19th century where major changes in agriculture, manufacturing, mining, transport had profound effect on socioeconomic conditions. Coal was a key resource during this time.
Fossil Fuels: Natural fuels such as coal or gas formed in geological past from remains of living organisms.
Carbon Footprint: The total amount of greenhouse gases produced directly or indirectly by human activities. Burning coal contributes significantly to one's carbon footprint.