In today's edition of Market Foolery, Motley Fool analysts answer a question from a listener with regard to the best way to invest in natural gas as a viable fuel source for the future. Investors could make a big conglomerate bet, like Royal Dutch Shell (NYSE: RDS.A), or a more focused play, like Westport (Nasdaq: WPRT). Generally speaking, Foolish analysts Mike Olson does not recommend an integrated major to play natural gas, and prefers an exploration and production company, or even a services company, instead.

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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.