(Al Jazeera) – The United Nations has warned that 2.5 million children could be displaced as refugees from Syria by the end of 2016 and that an entire generation risks having their future compromised. School enrolment rates, among the highest in the world before the war, have fallen dramatically, with only 17 percent of children displaced within Syria now in school – in some of the areas worst hit by fighting and indiscriminate air strikes, enrolment rates are as low as 6 percent.