The United Kingdom's highest court gave the green light for the construction of the planned third runway at London Heathrow Airport. A ban issued by the Court of Appeal at the beginning of the year was overturned. The lower court's ruling caused a stir internationally because it was based on the fact that the construction of a third runway was not compatible with the climate goals of the Paris Agreement. The Supreme Court saw the matter differently and overturned the decision. This means that the way is now finally clear. The court justified the current decision by saying that the plans were in line with the climate protection requirements at the time of submission. Heathrow can now continue with the project. The expansion is controversial and numerous affected parties, climate activists and even London's mayor Sadiq Kahn have taken the matter to court. However, the construction of the third runway is not yet a done deal, because formal planning permission has yet to be granted. The Supreme Court also ruled that the Paris Climate Agreement does not necessarily have to be taken into account.