Nearly 400 school districts spanning all 50 states are receiving grants totaling nearly $1 billion to purchase nearly 2,500 "clean" school buses under a new federal program.The Biden administration is making the grants available as part of a wider effort to accelerate the transition to zero emission vehicles and reduce air pollution near schools and communities.(AP Photo/Jacquelyn Martin, File)FILE - Vice President Kamala Harris, right, laughs with Environmental Protection Agency Administrator Michael Regan, during a tour of electric school buses at Meridian High School in Falls Church, Va., May 20, 2022.(AP Photo/Jacquelyn Martin, File)WASHINGTON (AP) — Nearly 400 school districts spanning all 50 states and Washington, D.C., along with several tribes and U.S. territories, are receiving roughly $1 billion in grants to purchase about 2,500 “clean” school buses under a new federal program.The Biden administration is making the grants available as part of a wider effort to accelerate the transition to zero-emission vehicles and reduce air pollution near schools and communities.Money for the new purchases is available under the federal Clean School Bus Program, which includes $5 billion from the bipartisan infrastructure law President Joe Biden signed last year.The clean bus program “is accelerating our nation’s transition to electric and low-emission school buses while ensuring a brighter, healthier future for our children,” Regan said, calling it “just the beginning of our work to ... reduce climate pollution and ensure the clean, breathable air that all our children deserve.″ ADVERTISEMENTThe EPA initially made $500 million available for clean buses in May but increased that to $965 million last month, responding to what officials called overwhelming demand for electric buses across the country."