Burning coal is the dirtiest, most old-fashioned way to produce electricity in the energy industry today.
However, in the coming years many governments and energy companies are hoping to reinvent coal as a cleaner, more modern form of energy in the coming years, as they try to reconcile energy security with the need to halt climate change.
Coal is plentiful and, despite the surge in coal prices this year, still relatively cheap compared with gas and oil. This means that developing countries such as China and India are burning increasing amounts of coal to fuel their rapid economic growth, while developed countries in North America and western Europe are turning to coal as a way to reduce their dependence on foreign gas imports.
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