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    What are the main types of coal?

    Lignite, bituminous, and anthracite differ in carbon content and heating value.

    What is the primary component of natural gas?

    Methane is the main component, making it the cleanest fossil fuel.

    How is peat formed?

    Accumulation of dead plant matter under waterlogged, acidic conditions over millions of years.

    What is the environmental impact of fuelwood use?

    It contributes to deforestation, soil erosion, and indoor pollution.

    What distinguishes anthracite from other coal types?

    It has the highest carbon content and is used for heating due to its high energy value.

    What happens during coalification?

    Buried plant matter transforms into harder, denser, and carbon-enriched coal.

    What is crude oil primarily composed of?

    It consists of hydrocarbons formed from decomposed organic material under heat and pressure.

    What is the role of charcoal in fuel usage?

    Charcoal is produced from wood and burns more efficiently in low-oxygen conditions.

    How does natural gas compare to other fossil fuels?

    It releases fewer pollutants when burned, making it the cleanest option.

    What is a peat bog?

    A wetland area where peat accumulates over time, creating a unique ecosystem.

    What are the uses of crude oil?

    It is refined into gasoline, jet fuel, and other petroleum products.

    What is the significance of shale gas?

    It is extracted from sedimentary rock and accessed through fracking.