Which topic concerns pollutant limits emitted by motor vehicles?

• A. Insurance for motorcycles
• B. Emission standards
• C. Helmet and eyewear
• D. Unsafe backing

Answer: (B)

Emission standards regulate how much pollution a motor vehicle may emit. They set pollutant limits for exhaust, covering common pollutants like carbon monoxide, hydrocarbons, nitrogen oxides, and particulate matter. These standards drive vehicle design and testing—manufacturers must certify that new models meet the limits before sale, and ongoing checks ensure compliance. By tightening these limits over time, they aim to reduce air pollution and protect public health, with different standards in federal and state programs and evolving technology such as catalytic converters and more efficient engines. The other topics relate to safety equipment like helmets and eye protection or to insurance and driving maneuvers, which are not about limiting vehicle exhaust pollutants.