 Marianne Jang works on sustainability with the New York State Office of General Services. She says to reduce emissions from concrete, producers can replace some of the cement with industrial wastes like slag and fly ash, or other alternative ingredients. To encourage the use of this lower emissions concrete, New York State recently passed new regulations. Starting next year, concrete used in large New York State projects will need to meet certain emission standards, and the state plans to raise those standards over time.