Al Jazeera: The United Nations Conference on Climate Change that ended on Dec. 14 in Lima, Peru, is a classic case of seeing a glass as half full or half empty. In the half-full view, Lima is a stepping stone to the kind of agreement the world needs to halt the devastating effects that scientists anticipate if global warming breaks the 2-degree-Celsius increase ceiling. In the half-empty view, Lima is a diversionary maneuver to hide the failure to even seek an enforceable agreement that is necessary if climate...