Scientists in San Francisco Bay Area, face a puzzle: measure pollution, but not truly understand it. The BEACO2N network from @UCBerkeley tracked CO₂, ozone, and aerosols across neighborhoods yet something was missing. Without knowing how wind, heat, or humidity carried those pollutants, the story of urban emissions was incomplete. Enter @WeatherXM. By deploying a community-powered network of weather stations, we filled in the missing chaptersm capturing real-time temperature, wind, and rainfall from the very streets where people live. Now, when the air changes, researchers can see why. Traffic surges, heat islands, and wildfire smoke patterns are mapped in real time, helping cities respond faster and plan smarter. Together, BEACO2N and @WeatherXM are turning data into action, transforming how we understand urban air and empowering communities to build cleaner, fairer, more resilient cities. Read the full case study below.

🔥 Exciting new work from our grad student Milan Patel! Using our BEACO2N network, Milan tracked a fire plume and quantified fire emissions! 📊770 kg PM2.5 📊70,000 kg CO2 📊2,500 kg CO Now out in ACS ES&T Air: doi.org/10.1021/acsestair.5c… @ACSPublications @EnvSciTech @UCBerkeley

In this ES&T article, @NaomiNaomu and @lab_cohen present 5 years of #CO2emissions for the San Francisco Bay Area using observations from the BEACO2N network, the HRRR-STILT model, and Bayesian inverse modeling. Read more in this #OpenAccess article: go.acs.org/8T4

It’s great to see BEACO2N sensors abroad inspiring change in local communities! Check out this article on how students changed their commute to reduce CO2 and CO emissions: gns.cri.nz/news/climate-scie…

We can see the 4th of July fireworks in our BEACO2N data! Check out the spikes in PM2.5 around 10 PM

Undergraduate Tanisha Joshi is making measurements of air pollutants CO, CO2, and NOx at an elementary school in Los Angeles for her honors thesis. Today we are presenting our mobile lab to the students. #lamegacitiescarbonproject #BEACO2N

Ron and the BEACO2N network are on the ground @COP26, meeting w/other Californians @CALtGovernor & Scottish representatives @AngusRobertson to emphasize the importance of GHG monitoring networks in combating climate change news.berkeley.edu/story_jump… @UCB_Chemistry @UniStrathclyde

We are very proud to support this important initiative and soon we will also have a BEACO2N network to measure #CO2 across the city of Leicester @uniofleicester @NCEOscience

The BEACO2N project is a key component to this global initiative to drive impactful policy decision making through low cost, highly effective urban GHG and air pollution sensors. Sensors live now in Glasgow for @COP26! youtu.be/J9pgngPSzRQ via @YouTube #COP26

What did shelter-in-place do to the Bay Area's air quality? The BEACO2N network is "lighting the way" to cleaner air #fiatlux youtube.com/watch?v=f6k5j4iN…

And we concluded the afternoon of the BASC symposium with more posters and talks, including a talk by Ron about BEACO2N!

Cool @WIRED article about @aclima w/ quotes from @joshapte @darbyjack (and BEACO2N Ron Cohen, who appear to be non-twitter-taggable).

#urban enviro data—high-cost precise sensors on cars @Aclima v #BeaCO2n low-cost low-res rooftop sensors wired.com/2017/06/race-pollu… via @WIRED

BEACO2N and @Aclima are using sensor technology to test air quality and pollution levels in urban areas: buff.ly/2rPVauI

We will feature @UofCalifornia BEACO2N project in our next edition of T&V next week. Exciting and innovative stuff, bit.ly/2dzE1x9.