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Carbon-based energy sources underpin the world economy. Presenter Justin Rowlatt visits London's Science Museum to hear how coal, oil and gas sparked the industrial revolution and have led to the unprecedented standards of living we enjoy today. Yet, as everyone knows, our fossil fuels will not last forever. And most scientists accept that our carbon dioxide emissions risk causing havoc to the world's climate and its oceans. Could a new carbon revolution - this time based on carbon materials - help wean mankind off its dangerous addiction to hydrocarbons? Justin visits two cutting-edge research centres - the National Composites Centre, and Manchester Graphene - to find out whether solutions to the planet's carbon crunch may be at hand.