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NEW YORK ( TheStreet) -- Natural gas remains a tricky place to invest, Jim Cramer told Debra Borchardt at TheStreet.com Thursday, as he responded to a recent report stating that the Barnett shale region has far more natural gas than anyone thought possible. Cramer said that the report is important because it dispels reports that suggested America's surge in natural gas reserves couldn't possibly be for real. But natural gas remains tricky, he said, as many of the shale fields still don't have pipeline access to get the fuel out. Meanwhile, oil still remains the most lucrative resource for which to drill, he added. That's why Cramer said he sold Southwest Energy ( SWN) for his charitable trust, Action Alerts PLUS. Among the natural gas stocks, Cramer said he still likes Linn Energy ( LINE) and its subsidiary LinnCo ( LNCO), but that others, such as Chesapeake Energy ( CHK), are not good investments at the moment. Watch the full Cramer interview here. To sign up for Jim Cramer's free Booyah! newsletter, with all of his latest articles and videos, please click here. -- Written by Scott Rutt in Washington. To email Scott about this article, click here: Scott Rutt Follow Scott on Twitter @ScottRutt or get updates on Facebook, ScottRuttDC