The goal of this program is to reduce children’s exposure to diesel exhaust in and around diesel school buses. Under the program, the State will provide grants to offset the incremental cost of eligible projects that reduce diesel exhaust emissions. Exposure to diesel exhaust can cause health problems and aggravate existing respiratory diseases such as asthma. Recognizing these health impacts, the U.S. Environmental Protection Agency (EPA) requires: 1) ultra-low sulfur diesel fuel to be the standard U.S produced on-road diesel fuel; and(2) new heavy-duty diesel buses to include advanced pollution control systems that significantly reduce emissions up to 95 percent starting in 2007.