Asphalt concrete
This is made by adding either zeolites, waxes, asphalt emulsions, or sometimes even water to the asphalt binder before mixing. It is good for the environment because small amounts of fossil fuels are used to make them. It also releases less carbon dioxide into the air. In 2012, a survey of producers that made asphalt in the US found that nearly 25% of asphalt made was warm mix.