In New York state, New Yorkers in downstate counties will soon benefit from cleaner air due to the increased use of Bioheat fuel in heating oil. Legislation signed Sept. 13 by New York Gov. Andrew Cuomo requires Nassau, Suffolk, and Westchester counties to follow New York City’s lead by blending at least 5 percent biodiesel (B5) into all home heating oil sold by July 1, 2018. New York City, the largest municipal consumer of heating oil in the country, has already taken advantage of biodiesel’s benefits by instituting a citywide 2 percent biodiesel requirement in 2012 that increases to 5 percent on Oct. 1, 2017. Now the entire New York City Metropolitan Area, representing approximately 70 percent of the state’s heating oil market, will have a 5 percent biodiesel blending requirement.