Why can’t the US export oil? A brief explanation

This is a very brief video from the Wall Street Journal which explains why the United States does not export oil and how a change in that law (which was just sneakily done through an obscure office within the Department of Commerce) will impact both the economy and the environment:

http://video-api.wsj.com/api-video/player/iframe.html?guid=327C14AE-F181-4BF1-9C8F-6D5ECCA7D6A6