A Heathrow worker who suffers from asthma has spoken about his very personal reasons for wanting to improve air quality.
As airside environment manager at the airport, Spencer Thomas is responsible for cutting emissions on the ground - from the fumes produced by taxiing planes to those emitted by support vehicles.
He is one of a number of Heathrow staff to appear in new videos produced by the airport highlighting what is being done to address air pollution in and around the airport.
The 44-year-old, who lives in Feltham, has worked at Heathrow since he was a schoolboy, when he would prepare bags for the airlines to earn pocket money.
He was later employed at various shops in the airport and then as a guard there before completing an Open University degree in his spare time four years ago and graduating to his current role.
"I'm asthmatic so air quality is something I'm passionate about. Heathrow is already leading the way in some areas when it comes to reducing emissions, but in other areas we're trying to get there," he said.
He said Heathrow had already invested around £20m to supply power and pre-conditioned air to planes on the ground so they can keep their engines switched off once at the gate.
He also highlighted the airport's goal for all the cars or small vans it owns or leases to be electric or a plug-in hybrid by 2020, and said it was testing a rapid charger which could refill a vehicle's battery in 40 minutes rather than overnight.
Mr Thomas said it had been a long time since his asthma had flared up but the condition, which pre-dates his time working at Heathrow, meant he was acutely aware of the importance of air quality.
"The people I speak to around here... worry what would happen if Heathrow wasn't around"
He is the latest in a long line of Heathrow workers in his family, including his father, brother and uncle, and says around half the people on his street rely on the airport for their livelihoods.
"The people I speak to around here, even those who are retired, recognise the need for expansion. They worry what would happen if Heathrow wasn't around," he said.
As well making Heathrow's fleet cleaner, a big part of Mr Thomas' job is persuading the airlines themselves to commit to reducing emissions.
But he insisted most now required little encouragement and often contacted him to ask about how they could incorporate the latest green technology, especially with the cost of electric vehicles having "tumbled" in the last few years.
Air pollution is perhaps the biggest barrier to Heathrow getting a third runway, so it is of little surprise the airport is keen to highlight its eco credentials in the new video camapign.
Levels of toxic particles close to the airport regularly breach legal limits but Heathrow insists it is not solely to blame.
Non-airport related traffic on the M4 and other busy roads is responsible for the bulk of this pollution, it says.
But it has been keen to highlight what it is doing to reduce emissions from both aircraft and cars, buses and lorries travelling to and from the airport.
Bosses at Heathrow earlier this year unveiled a 10-point plan to help reduce air pollution in and around the airport.
But a recent survey suggested most Londoners would prefer to see expansion at Gatwick instead of Heathrow, with air quality a major factor in their choice.
More than 50 people took part in a flash mob protest at Heathrow on Saturday, unveiling red t-shirts and chanting "no third runway".
The Airports Commission recommended a third runway at Heathrow on the condition local air pollution targets could be met, though it said it was confident this would be possible even with expansion.
The Government is expected to announce before Christmas whether a new runway should be built at Heathrow or Gatwick.
