The following video is part of our "Motley Fool Conversations" series, in which analyst John Reeves and advisor David Meier discuss topics across the investing world.

Two of the biggest names in energy are betting that natural gas prices will go up eventually. The two companies are Royal Dutch Shell and ExxonMobil. David finds this intriguing, but still feels that natural gas may fall further before it turns around. That's why he thinks Westport Innovations is a great way to play natural gas right now.

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This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.