"Mother nature always wins" - an Alaskan response to Shell's drilling plans

Tumbling oil prices have done little to dent Shell's ambitions to exploit the energy potential of the Alaskan Arctic. Exploratory tests suggest that there could be as much as 24 billion barrels of oil under the sea there - sounds a lot - but it would only keep the US running for three to four years. Environmentalists insist the risks of offshore drilling are too high - an oil spill would be an environmental catastrophe. Shell has told the BBC it intends to press ahead with its plans in a 'responsible' way, saying there is a good chance of finding vast reserves. Fergus Nicholl speaks to Lois Epstein, Arctic Program Director for the Anchorage-based Wilderness Society - a conservation group from the state.