What does compliant with California emission mean?

"Compliant with California emissions" refers to vehicles or equipment that meet the stringent air quality standards set by the California Air Resources Board (CARB). These standards are among the strictest in the United States, aimed at reducing air pollution and greenhouse gas emissions. Compliance often involves using advanced technologies and emissions control systems to ensure that pollutants are kept within allowable limits. Manufacturers must demonstrate that their products adhere to these regulations to sell them in California.