The United Nations on Wednesday asked donor nations to give $7.7 billion to pay for humanitarian emergencies from Afghanistan to Zimbabwe next year, significantly less than the global body has requested for 2011. (..)The 2011 appeal is significantly lower than the $8.9 billion that the global body requested for the current year. But requests to U.N. donors are revised throughout the year to respond to unforeseen disasters, which this year included floods in Pakistan, the civil war in Libya, and the ongoing conflict in Yemen.