Government 'watering down' pollution limits to meet Heathrow pledge

MPs say ministers are not doing enough to demonstrate how third runway would meet obligations on noise and air qualityThe government is set to “water down” limits on aviation emissions and is shifting targets to meet its pledge to mitigate the environmental impact of expanding Heathrow, MPs have said.The cross-party environmental audit committee said ministers were not doing enough to demonstrate a third Heathrow runway could be built without breaching laws on air quality and carbon