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Russo said the Roman poet Horace and ancient Roman historian Marcus Terentius Varro had related that Romulus was buried behind the “rostra” - a tribune where speakers addressed the crowd in the forum.

"This is just a taste of thing to come," Varro said.

Energy efficiency efforts also are ramping up around the world, Varro said.

"We're absolutely sure India's coal demand will continue to grow," Varro said.

This is why "we are going to continue to need conventional power generation for a long time," says Mr Varro.