Last month, the government backed the airport's proposals for a third runway, which could increase the annual number of flights from 480,000 to 756,000. In its letter to Transport Secretary Heidi Alexander, the cross-party group with the exception of Reform UK Assembly Member Keith Prince said the impact of aircraft noise from London's multiple airports was "already too great." The government said any airport expansion "must be in line with environmental targets".
Under the terms of the 2015 agreement, world leaders pledged to limit the average global temperature rise to well below 2 degrees Celsius (3.6 degrees Fahrenheit) and pursue efforts to cap it at 1.5 degrees. Countries also agreed to renew and communicate their targets every five years. The latest submission deadline was earlier this year, and the pressure is now on for states to announce their latest commitments to moving away from fossil fuels.