Dhaka, June 14 -- A global oceans summit concludes Friday with nations taking major steps toward marine protection and vowing a showdown over deep-sea mining, but criticised for leaving fossil fuels off the agenda.Countries hoping for new financial pledges to assist with combating rising seas and overfishing were also left disappointed at the UN Ocean Conference in France.More than 60 heads of state and government joined thousands of business leaders, scientists and environmental campaigners over five days in the southern city of Nice.The United Nations says the world's oceans are facing an "emergency" and the Nice gathering was just the third - and the largest yet - dedicated entirely to the seas.Activists unanimously praised concrete prog...