
A new report says Heathrow may get a third runway. It could harm the health of many people. About 3 million people live near the airport. A team called Aecom did the study. They work for the government. The report says the expansion is bad for people's health.
The runway would change the area a lot. It would affect houses and schools. It would affect hospitals and parks. It would affect roads and trains. It would affect water and the look of the land. The report says there would be some good things too. More people could get jobs. People could learn new skills.
The report says bad effects cannot stop. Even with safety measures, many harms would still happen. The government must think about this. Many people near Heathrow could get sick. The runway may cost too much for local people.