a safe way to play natural gas

Moneyweek.com reported on a safe way to play natural gas :

Natural gas is an extremely useful fuel. In 500 BC, the Chinese used natural gas to turn seawater into drinking water. In Victorian England, they used it to power streetlights. When I traveled around Asia back in August 2008, I found them using natural gas to fuel taxis. And in Canada, they run their buses on natural gas.

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