Florence Nightingale wrote about the importance of fresh air, sunlight and good nutrition over 150 years ago. Good to see King’s College Hospital opening a rooftop garden for critical care patients. This isn’t new. We’re rediscovering something we already knew. www.kch.nhs.uk/news/outdoor...

Parents of children with wheeze or asthma: Have you noticed air pollution making symptoms worse? Or is it mainly viruses in your experience? This little inhaler is very new to us and we’re still figuring it all out.

Filtering the air may help prevent your own infection from becoming more severe If everyone in a household becomes infected with the same virus, does it help to isolate from each other and can you be a danger to yourself? Read on to find out... 🧪🧵1/ #AirQuality #IAQ #Ventilation #Infection #COVID

🧵 1/2 What actually is an air purifier? Think of it like a vacuum cleaner for the air. A good HEPA air purifier can help capture: 🔬 PM2.5 pollution 🐛 Dust mite allergens 🍄 Mould spores 🐾 Pet dander 🌿 Pollen 🚗 Pollution that drifts indoors

If it’s hotter outside, you’re letting heat in. Open windows early morning and late evening instead. Keep the blinds closed during the day. Closed windows can also mean rising CO₂ indoors - so if everyone feels sluggish, it might not just be the heat. #Heatwave #IndoorAirQuality #CleanAirWhere

🧵1/4 Children with SEND are disproportionately affected by their environment. We talk about calm spaces, sensory rooms and adapted teaching. But we are missing something important - indoor air quality.

Brilliant initiative - this is exactly what schools need. At Clean Air Where we are working on the training side of this - helping staff understand why IAQ matters so the standards actually land. Excited to be part of this.

🧵1/4 The SEND consultation closes tonight at midnight. Every Child Achieving and Thriving covers calm, safe classrooms, specialist support, behaviour, curriculum and funding. It talks about environment. It does not mention the air in it.

🧵1/6 How is anyone supposed to thrive when their environment is affecting their mood, concentration and ability to think clearly? Most of us accept feeling foggy as normal. It is not. It is often the air.

🧵1/6 It is Mental Health Awareness Week. The theme is Action. Here is one action nobody is talking about. Improving the air quality in the room you are in right now.

I took my CO₂ monitor to vote last week. Good reading, but almost accidental. For clinically vulnerable people, air quality at a polling station is a barrier to democracy. Open the windows. @CEVFamilies #CleanAirWhere #Ventilation #CEV #AccessibleDemocracy

🧵1/6 The UK’s new National Allergy Strategy calls for ventilation, filtration and exposure reduction as key prevention priorities. Here is what that means in practice. The air inside your home and workplace could be triggering your allergies.

A New Children’s Book Empowers Young Readers to Breathe Clean Indoor Air Nicholas isn’t your average kid. He has a unique superpower: he can see invisible air pollution. When Nicholas notices these harmful particles making his classmates sick, he knows he must take action. But how can you fight…

🧵1/4 The UK just launched its first ever National Allergy Strategy. One of its five goals is prevention. And prevention includes the everyday environments we occupy. Indoor air is part of that picture.

Some people have asked me what I think about Hantavirus - and the answer is that there are far better people than me to get that info from! I've made a short starter pack for some great accounts to follow in case useful ! (NB it includes me by default) #Hantavirus go.bsky.app/UEkjsT

I have a colleague that researches the impact of small particles (pm 2.5's; tiny particles that can go deep into lungs and cross into blood) on health. It's not good. Not just for people with lung disease, but any illness, and even healthy people. I'll be biking with an N95 some days 🤦

🧵1/4 I did not post for World Asthma Day. We spent the night in hospital with our youngest in respiratory distress. We left with a diagnosis of viral induced wheeze and an inhaler. On World Asthma Day.

🧵1/3 You cannot smell CO₂, PM2.5 or nitrogen dioxide. You would not drink dirty water. So why are we okay breathing dirty air?

🧵1/4 A King’s College London study found babies exposed to higher air pollution in the first trimester scored 5-7 points lower on language tests at 18 months. It is quite shocking that an invisible risk can have such an impact.

I took my CO₂ monitor to Nickelodeon Studios. Under 600ppm. Nearly outdoor air quality. That is what good ventilation looks like. Now imagine the air in your child’s classroom. #IndoorAirQuality #AirQuality #CleanAirWhere #Schools #Ventilation

🧵1/8 If you are sick of being sick, take note. CO₂ is invisible. You cannot smell it. You cannot see it. But it is affecting how you think, feel and perform right now.

Earth Day thought: outdoor pollution gets all the attention. Traffic fumes, factory emissions, wood burning and so many other pollutants. All important. But we spend 90% of our time indoors. That air gets ignored. #EarthDay2026 #IndoorAirQuality

🧵 1/7 CO₂ is something we all produce every time we breathe out. Outdoors, it’s not a problem. Indoors, it builds up fast - especially in busy or poorly ventilated spaces.

😷 CO₂ levels at a GP’s office hit 1,400ppm - in the room meant to keep you healthy. An empty waiting room was already at 1,000ppm. Is your doctor’s surgery making you sicker? #IndoorAirQuality #CO2Levels #PublicHealth

Indoor air quality is finally getting attention. It’s good to see more webinars on this topic. The American Lung Association has published practical steps to improve the air we breathe indoors. Link below to sign up. 2026 Clean Air School Symposium action.lung.org/site/TR?fr_i...

$135bn a year. Estimated cost of long Covid across developed economies (OECD data). Not just healthcare - workforce impact. Airborne infections matter. Indoor air is one of the few things we can change. www.bloomberg.com/news/article...

Crinkly tulip appreciation post

Busy venue, peak time, high occupancy CO₂ stayed around 600 ppm throughout That’s a strong signal of good ventilation and low rebreathed air - something that impacts comfort, cognition, and exposure risk You wouldn’t share your drink. Why share someone else’s air? #IndoorAirQuality #Ventilation

Do you track the thing you do 20,000+ times a day? We track food, steps, sleep, hydration. But not the air we breathe. Poor air affects: • concentration • mood • infections • long-term health You can’t see it - but it matters. #WorldHealthDay #StandWithScience

🧵 1/ Over the weekend I spent the morning at a kids’ role play café / soft play party and took my monitor along. CO₂ levels were higher than the London Underground at rush hour. In a children’s play space.

bsky.app/profile/samm... #Meningitis #cleanair

The UK Covid Inquiry has acknowledged airborne transmission was not properly considered early on. We focused on surfaces. We overlooked the air. If infections spread through the air, indoor air quality is fundamental to health. This must now be reflected in PPE guidance for the NHS.

🧵 1/3 A kids birthday party… but we also planned the air. Packed hall of kids and parents. Windows open. Air filters running. CO₂ stayed under 800 ppm the whole time. Btw, the cake is a Diglett Pokémon, not a giant poop. #Pokemon #Diglett

Another visual of the invisible. Following London’s high pollution levels last week I thought I would compare a new mask to one worn on the commute for around six hours. It’s pretty clear it’s doing its job, I’m just happy that gunk isn’t in my lungs 🤮 #airpollution #pm25

🧵1 196 PM2.5 inside a London Underground carriage today. Just moments earlier on the platform it was 80. Sometimes the air changes dramatically in just a few steps. #AirPollution #PM25

1/ If I hear one more public official call indoor air filters a "band-aid," I'm going to explode! Filtering indoor air should be as standard as filtering water. Full stop. 🧵

🧵 1/ London’s hazy sky this week isn’t just weather. It’s a regional pollution event affecting much of southern England.

Clean air in schools is gaining momentum 🌿 Webinar 11 March, 4pm on improving indoor air for students and staff. Open to parents, governors, educators and anyone interested in healthier learning spaces. Register: bit.ly/unisonair #CleanAir #HealthySchools

Clean Air in Schools: Leaders Making it Happen 11 March, 4pm Join our webinar, held in partnership with education unions and @crfoundationus.bsky.social, to explore the experiences of schools on their journey to improve indoor air for students and staff. Register now: bit.ly/unisonair

🚸 New ventilation & air quality guidance for schools & nurseries just published. Indoor air matters. We wouldn’t share water bottles. Shared air deserves the same thought. Clean air belongs in every classroom. 💨🏫 www.gov.uk/government/p...

ICYMI yesterday | Another nail in the coffin of #WoodBurningStoves as evidence of harms piles up. #BanWoodburning www.gov.uk/government/s... and cleanair.london/policy/clean...

💚 Join the #CleanAirCrowd! 💚 We’re bringing people together across the country to take part in a 7-day #AirPollution challenge, from Sat 28th Feb to Fri 6th March. With one daily action, it couldn't be easier to get involved and share the #CleanAir love! Sign up now: bit.ly/clean-air-cr...

Breathing in air pollution from wood burning increases your risk of heart and lung disease, asthma, diabetes and dementia. Even homes with newer “Ecodesign” wood burners are three times more polluted than those without. This #CleanAirNight, share the facts about wood burning.

Safeguarding systems often fail not because policies are missing - but because staff are not supported to understand why those policies exist. This is something I’ve seen first-hand, and it keeps coming up in conversations with other parents. #Safeguarding #EarlyYears 🧵

Run those air cleaners harder than ever. (I know some people turned them off or down so they could better hear horns or whistles but it might be time to crank them up.)

The British seem to have accepted condensation and sometimes mould, as an inevitable part of winter. Did you know it doesn’t have to be that way?

Merry Christmas 🎄 🥂 Most winter bugs don’t mainly spread via touch. Flu, RSV, COVID, colds and more spread through shared indoor air - even without coughing. Normal breathing and talking is enough. Open the windows, even just a bit. Freshen the air. #IndoorAirQuality #CleanAirWhere

Study in Helsinki indicating benefits of portable air cleaners on lowering infection risk in daycare centers, less absences & parent absences from work in intervention vs. reference (no air cleaner) groups. Cleaning indoor air is not difficult and it works. www.sciencedirect.com/science/arti...

🧵1/ Flu is surging again, & patterns look uncomfortably familiar. The lesson from covid remains unchanged: individual responsibility isn’t enough. We need systemic measures that make protective behaviours easy. @profstevegriffin.bsky.social Stephen Reicher & I offer some thoughts @bmj.com

For anyone new here - I’m Hannah, an NHS radiographer and a mum In 2020, I went down a clean air information wormhole and it completely changed how I see everyday life - our health, energy, and how we function day to day Clean Air Where grew from that shift in perspective #CleanAir #AirQuality