Margaret Barnard was secretary of a British Lung Foundation-supported Breathe Easy in Neath, a Welsh group of people living with lung disease, mainly chronic obstructive pulmonary disease. The group offered mutual support and raised money for pulmonary rehabilitation equipment. She was utterly unforgettable to everyone who knew her. I mention Margaret not just for her award-winning work with the British Lung Foundation, but her determination to live well, set an example, despite a most debilitating condition that eventually took her life in 2016.

Margaret may have been marvellous, but suffocation is not. That's why we need action to help all the other Margarets in Wales—5,500 years of life lost every year in the former Abertawe Bro Morgannwg university health board area, 368 actual deaths from nitrogen dioxide, and the smallest particulate matter pollution every year, and that's just one health board area. In my own area, in South Wales East, there's an estimated 300 deaths a year of those aged 25 and above that's been attributed to air pollution.

Now, these may not be the headline-grabbing figures that we see for heart disease and cancer, but, of course, air pollution is implicated in cardiovascular and cancer cases too. You might expect the number of deaths due to air pollution to look pretty bad in areas of densest population, of car users, power stations and, of course, heavy industry. But, actually, air pollution's status as an invisible killer is best evidenced by the fact that it's in north Wales where we see the greatest number of deaths, due to the smallest particulate matter, which was mentioned by my colleague Angela Burns earlier—the danger dust that comes from brake wear, tyre wear and from road surface wear. North Wales may be more rural, less populated, but like areas in the south—Newport and conurbations—it doesn't have free-flowing traffic. That traffic, rather than other sources, is the greatest air contaminant in Wales, and it's a daunting problem. Replacing petrol and diesel vehicles with electric equivalents still means that cars, lorries and buses producing that danger dust—the PM2.5—are with us today. Yet, separating us from our cars, as we've discussed, requires huge culture change as well as realistic alternatives. Of course, change has happened in the past; I remember when ultra-low sulphur petrol was first brought in—hailed as a great innovation. It was an innovation—it was better than the leaded petrol that had come before—but here we are a number of years down the line now and we need other innovations as well, and electric vehicles must be part of that.

It needs us to be brave and bold, and that's far less intimidating if we all agree it needs doing. I think the political will is here in this Chamber, however disguised it is by the amendment that Angela Burns mentioned earlier—the 'delete all' amendment. We do welcome Plaid Cymru's amendment, which we think brings a valuable aspect to this debate, but we look to see whether that will carry.

This isn't a time for Government, either Welsh Government or UK Government, to get defensive; it's time for all of us to turn a commitment into action. Bridgend County Borough Council announced its first air quality management area in January 2019 for Park Street, not incidentally a particularly deprived area. Details on exactly how the council plans to make improvements there are not so easy to find, although you can find details of how planning permission for two controversial building developments will add further to traffic congestion there.

It's an issue not just for us to discuss, but for local authorities out there across Wales who do a lot of the work on the ground, to make sure that there's transparency in their operations so that people do have access to this sort of information so that informed decisions can be taken. Reducing the volume of road traffic is one thing, but poor traffic management is every bit as much of a culprit here as our love of the car, and it's a big ask of councils to retrofit much-needed changes to local infrastructure, particularly at a time when, obviously, budgets are stretched.

Fifty miles per hour zones are a potential part of the answer, but not the whole answer that Welsh Government might be hoping for. In my area, we have high hopes for the south Wales metro, but many of the more promising innovations are in the future: in south-west Wales, a metro there may be part of the answer, and we look for planning towards that; traffic management must be part of the answer and reducing traffic volume over time; more active travel has been mentioned by Assembly Members; public transport, of course, that people will be able to use effectively, and I mentioned in the business statement yesterday how in my area it's one thing to get to Cardiff to work in the morning, but it's very difficult to get home at night when there isn't a bus service after 5.30 pm. Local development plans should insist that the location of candidate sites for housing will help and not exacerbate the problem in existing hotspots—rather, it should alleviate them. As I said earlier, Dirprwy Lywydd, we are not supportive of the 'delete all' amendment. We do support what the Plaid Cymru amendment brings to the debate.