Renewable energy could be Edison's last revenge

Direct current – the electrical distribution method championed by Thomas Edison – is making a comeback as a promising money-spinner in renewable or high-security energy projects worldwide.

LONDON (Reuters) - At the start of the 20th century, inventors Thomas Alva Edison and Nikola Tesla clashed in the "war of the currents." To highlight the dangers of his rival's system, Edison even electrocuted an elephant. The animal died in vain; it was Tesla's system and not Edison's that took off. But today, helped by technological advances and the need to conserve energy, Edison may finally get his revenge.

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