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Simon Birkett, Founder and Director of @CleanAirLondon, has championed @WHO #AirQuality Guidelines to protect public health and fight #ClimateChange since 2006
May 23, 2023 8 tweets 11 min read
#CleanAir4Europe | Bard’s assessment of the 5 best and worst things about the proposed new EU #AirQuality Directives (so far!) cc @EuroRespSoc @HEIresearch @ISEE_global @VSinkevicius @DrMariaNeira @javilopezEU

The proposed new EU air quality directives are a step in the right…… Image Important for #CleanAir4EU and #CleanAir4Europe…

Maps and modelling show no-one in UK exposed to PM2.5 > 8 ug/m3 by 2030. #BaselineCase! #GothenburgProtocol…

Section 11:

HT @Meteorologene @IIASAVienna
Feb 14, 2023 12 tweets 6 min read
BREAKING | @DefraGovUK admits breaching UK national legal ceiling for PM2.5 in 2021 in its new annual statistics for ‘Emissions of air pollutants in the UK’. Thread

Main page:…


PM2.5 and PM10… “For PM2.5, there is a single annual ceiling of 80.8 thousand tonnes of emissions between 2020 and 2029 (set at a 30% reduction from 2005 levels), applicable to NECR and CLRTAP. In 2021, the UK was not compliant with this commitment, with 83.2 thousand tonnes of PM2.5 emissions”
Nov 22, 2022 16 tweets 26 min read
70th anniversary of the #GreatSmog is 5-9 December 2022. We'll be tweeting updates and providing more detail here:… Image #GreatSmog thread 2/... | @metoffice's #DailyWeatherReport for November 1952 shows temperatures and sunshine dropping steadily and rainfall increasing through the month at the #KewObservatory. Find the archives here HT @metofficece… ImageImageImageImage
Aug 6, 2022 38 tweets 58 min read
#CodeYellow #AirPollution advisory for Monday-Wednesday in parts of London and then Wales and South West England. Probably PM2.5 but could include ozone. @BWallaceMP @DefenceHQ should warn military on endurance exercises cc @H_S_E ImageImageImage #CodeYellow | Widespread MODERATE ozone and particle #AirPollution episode underway by Tuesday. Worsening sharply Wednesday and Thursday as winds turn easterly (bringing our fumes back to us with more from others). Check health advice and warn military on exercises cc @BWallaceMP ImageImageImage
Jul 14, 2022 20 tweets 13 min read
#PollutionBomb expected to hit much of the UK on Monday and Tuesday. 8-hr average ozone will build during the day and may trigger 1-hour (180ug/m3) #CodeRed #PollutionAlert by Monday evening. See: and and……

I’m grateful to @SadiqKhan @MayorofLondon @sabrodrigues61 for warning Londoners about these life threatening #AirPollution episodes
Jul 8, 2022 43 tweets 84 min read
#EllasLaw | Second reading of @GreenJennyJones's #CleanAirHRBill in @UKHouseofLords from 10am Friday 8 July HT @EllaRobertaFdn. It's about the #HumanRight to #CleanAir and meeting new @WHO guidelines asap. Follow this thread for live updates. Details here: #EllasLaw | Ella Roberta Adoo Kissi-Debrah died tragically - aged nine - on 15 February 2013. #AirPollution was listed as one of the medical causes of death after a long campaign by her mother @EllaRobertaFdn won a second inquest…
Sep 3, 2021 16 tweets 19 min read
Official #CodeRed alert | Major particle #AirPollution episode building as winds slow and turn easterly. MODERATE #AirPollution in places every day until HIGH 7-8/10 by Monday night or Tuesday. Check updates and health advice ImageImageImageImage Thread 2/... Major ozone and particle #AirPollution episode building. HIGH ozone by Sunday and Monday evenings and HIGH particles by Monday morning in London and eastern England. MODERATE in many places HT @CopernicusECMWF… ImageImageImage
Apr 16, 2020 6 tweets 5 min read
#PollutionAlertMidApril2020 | Nasty MODERATE particle #AirPollution episode underway. Possibly HIGH in South East England into weekend. Of course traffic pollution (nitrogen dioxide) is LOW but particles come from all sources eg agriculture, wood and rubbish burning, industry etc ImageImageImageImage Thread 2/... from yesterday and earlier
Dec 27, 2018 5 tweets 9 min read
#CodeRed | Wave of HIGH 9/10 particle #airpollution will hit London by Thursday afternoon. @MayorofLondon should warn people. Relief Friday? cc @PHE_London.

NB @LondonAir particle data is reset each midnight so better to follow hourly data:…

Thread 1/.. Useful links:

1. @LondonAir…
2. @CopernicusECMWF…
3. @MetClim…
4. @EUEnvironment…
5. @airTEXT
6. @DefraUKAir aka @michaelgove