It’s been a year since the Deepwater Horizon explosion and oil spill and many questions remain about the long-term impact that the disaster will have not just on public policy, but on the fragile ecosystems of the Gulf Coast.  To mark the one year anniversary of the disaster, two of our regular contributors reflect on what the future looks like one year later.  Lisa Margonelli  is the Director of the Energy Policy Initiative at the New America Foundation and  David Biello  is an editor at  Scientific American.