Third Heathrow runway should only go ahead if airlines pay for cleaner flying, say advisers

The government has climate advisers. They talk about Heathrow Airport. There is a plan for a new runway. It is the third runway. The advisers say it cannot be built now. They say the climate policies are not right.

The advisers want airlines to pay. They should pay for cleaner flying. This means using less fuel. It helps the environment. The runway can only go ahead if airlines do this. The advisers think this is very important.