Reuters: New York City unveiled new fuel emissions standards for the city’s 10,000 black taxis on Wednesday that will compel the town car owners to switch to hybrid technology within five years. The move — part of Mayor Michael Bloomberg’s plan to decrease the city’s carbon emissions by 30 percent by 2030 — comes less than a year after Bloomberg announced the city’s 13,000 yellow taxi cabs will go hybrid by 2012. Black town cars service mostly corporate clients and are responsible for …