Levels of nitrogen dioxide at Gatwick airport are dangerously high.

A report also showed Shoreham airport was only just within recommended European Union safety limit for the noxious gas.

Experts said high levels could pose a threat to people with lung conditions such as asthma, bronchitis and emphysema.

While aircraft contributed to pollution levels at airports, the main source was from cars on approach roads.

The EU has ruled that nitrogen dioxide (NO2) levels should stay below 40 microgrammes per cubic metre of air.

The report by the Chartered Society of Physiotherapy, revealed that major airports such as Gatwick and Heathrow exceeded the safety levels by as much as 75 per cent.

Professor Graham Pope, of the society, said: "The effects of airport emissions on air quality and public health are of serious concern.

"There is no doubt aircraft contribute to the problem.

"But it should be noted that cars, buses and taxis are the dominant sources of pollution.

"We urge the Government to consider ways of balancing passenger convenience with improving public health when considering expansion."

Monday, March 13, 2006