Read and share our @PennLive column: “Thanks to shale, the U aspwv1970-01-01T00:00:00-05:00January 1st, 1970|Twitter| Read and share our @PennLive column: “Thanks to shale, the United States is the world’s number one oil and natural… https://t.co/P9HAyhphy3 Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkEmail