 Due to the low noise typical of electric vehicles at low speeds, the National Highway Traffic Safety Administration ruled that all hybrids and EVs must emit artificial noise when idling, accelerating to or going in reverse by September 2019.As a signatory party to the 2015 Paris Climate Agreement, the United States government committed to reduce its greenhouse gas emissions, among others, from the transportation sector.Already in 2015, the Federal government had set targets to reduce its own carbon footprint 30% by 2025, and acquire 20% of all new passenger vehicles as zero emission (all-electric of fuel cell) or plug-in hybrid by 2020, and 50% by 2025.