abigail hopper is the director of ocean energy management and she joins us now on the phone. ail, the other huge news today was, horse, shall getting the green light to potentially start drilling in the arctic. does that clear the way for other oil companies do the same? abigail: it certainly is an important step forward for shell . it would be part of their that shell approval still requires to get permits from several other agencies, but it is a good first step for them for this drilling season. 20% of the worlds oil could be under the arctic. all anyonethink that in this industry worries about in the games that they play in as arctic think of it important and lucrative, but my expectation is that companies will wait and see how it prevails. alix: shell has been preparing for this, but how much does it cost to drill in the arctic and how quickly could well come out? abigail: i would obviously be better source for how much it would cost, it's clearly quite expensive and there are for having aeless rig right there, so they are going to have two of those rigs over the summer if