Images of climate action and impacts in NYC with various colorful icons representing sustainability and the text Earth Day 2026: Climate & Environmental Justice in New York City, Thursday, April 23, 2026, 5:30-8pm, Faculty House, Columbia University, Register at events.columbia.edu/go/harlemearthday

On Apr 23 5:30-8pm ET, join researchers, elected officials, and community leaders for Climate & Environmental Justice in NYC, presented by the Greater Harlem Chamber of Commerce and Columbia Climate School, moderated by @dzarrilli.bsky.social. #EarthDay Learn More/RSVP: https://bit.ly/4dxPnAV

Join us on April 23rd as the Columbia Climate School and the Greater Harlem Chamber of Commerce co-host another great #EarthDay event exploring the realities of climate change and the work to achieve environmental justice in New York City.

Register here: events.columbia.edu/go/harlemear...

NYC Mayor Zohran Mamdani. Credit: Karamccurdy via Wikimedia Commons

Can Mayor Mamdani turn climate action into an affordability win for NYC? Dean Alexis Abramson, professor of climate Sheila Foster, and Columbia University chief climate/sustainability officer Daniel Zarrilli discuss opportunities & challenges ahead for NYC’s new mayor: https://bit.ly/49KrsvI

From Recovery to Resilience: NYC's Innovative Response to Hurricane Sandy The Epicenter editors recently interviewed Daniel Zarrilli, former Chief Resilience Officer for New York City and current Chief Climate & Sustainability Officer at Columbia University, about his work ...

Columbia chief climate/sustainability officer @dzarrilli.bsky.social, former NYC chief climate policy advisor, discusses lessons on climate resilience & adaptation from NYC's post-Hurricane Sandy recovery effort that can help cities worldwide prepare for escalating climate risks. Via The Epicenter.

I shared some ideas with @gothamist.com to help get New York back on track with its climate goals given the political headwinds of the moment.

Earth Day Climate Change Conference - Climate and Environmental Justice: A Discussion of New York City's Plans - Immediate & Long-Term Impacts of Climate Change on Health Hosted by The Greater Harlem Chamber of Commerce and Columbia Climate School

TODAY! Apr 21 5:30pmET, join researchers, elected officials, community leaders for Climate & Environmental Justice: A Discussion of NYC's Plans, hosted by Greater Harlem Chamber of Commerce & Columbia Climate School, moderated by @dzarrilli.bsky.social. RSVP: www.climate.columbia.edu/events/clima...

Earth Day Climate Change Conference - Climate and Environmental Justice: A Discussion of New York City's Plans - Immediate & Long-Term Impacts of Climate Change on Health Hosted by The Greater Harlem Chamber of Commerce and Columbia Climate School

On Apr 21 5:30pm ET, join researchers, elected officials, community leaders for Climate & Environmental Justice: A Discussion of NYC's Plans, presented by Greater Harlem Chamber of Commerce & Columbia Climate School, moderated by @dzarrilli.bsky.social. RSVP: www.climate.columbia.edu/events/clima...

NYC Coastal Resiliency Interview with Daniel Zarrilli by The Weather… | Columbia Climate School Why are flood barriers paramount, will more measures be needed in light of sea level rise, and what are other cities doing that NYC has considered? Our…

Why are flood barriers paramount, will more measures be needed in light of sea level rise, and what are other cities doing that NYC has considered? Our @columbiauniversity.bsky.social chief climate & sustainability officer @dzarrilli.bsky.social discusses these questions with @weather.bsky.social.

How the Tariffs Could Raise New Yorkers’ Already-High Electric Bills It is unclear by how much, but experts said that a tariff of 10 percent or more would add costs that would be passed on to consumers to some extent.

"About the only certainty, Mr. Zarrilli said, was that a tariff of 10 percent or more would add costs that would be passed on to consumers to some extent."
www.nytimes.com/2025/02/03/u...

Spotted #onStatenIsland

Insurers Are Deserting Homeowners as Climate Shocks Worsen Without insurance, it’s impossible to get a mortgage; without a mortgage, most Americans can’t buy a home.

"As a warming planet delivers more wildfires, hurricanes and other threats, America’s once reliably boring home insurance market has become the place where climate shocks collide with everyday life."

www.nytimes.com/interactive/...

From Urban Green Council: Left: Chart: Benchmarked Emissions and Energy Trends, 2010–2023 Right: "Energy use and carbon emissions from NYC’s largest buildings have fallen over the past 13 years. These metrics vary from year to year due to multiple factors, including the fuel mix for electricity generation and variable weather. However, they have both trended down due to more efficient energy use, improved district steam production and delivery, and accelerated fuel switching. 26% Reduction in emissions from large buildings since 2010"

NYC buildings have been getting steadily more energy efficient since the city passed its landmark building emissions law, LL97.

92% of covered buildings are now within the 2024 emissions limits (vs 88% last year).

Fresh number crunching from Urban Green Council (h/t @petesikora.bsky.social):

What 4 Years of Delay Means to an Offshore Wind Project New York’s Attentive Energy is now on pause, meaning more pollution, stalled plans, and a tighter margin for error.

“Any of these projects faltering is just going to keep New York City reliant on an aging and dirty fossil fleet,” @dzarrilli.bsky.social tells @emilypont.bsky.social.

How Attentive Energy's offshore wind pause could derail New York's climate plans:

I'm sure. This is our post-IPEC closure reality...

Totally. Big upstate/downstate divides on the grid...

58% of New York's electricity coming from sources other than fossil fuels right now - the highest I've happened to notice... ⚡

Hochul Tries to Meet New York’s Climate Goals Without Provoking Trump Gov. Kathy Hochul is contending with pressures from environmental advocates and President-elect Donald Trump as she charts a path forward.

"There are all sorts of ways in which, if New York really stepped up to the plate in a vigorous way, it could have a big ripple effect, not just in the United States but around the world."

#CLCPA
www.nytimes.com/2024/11/29/n...

Ouch

Thankfully, two Tier 4 projects were awarded, with CHPE already under construction… ⚡️

Key bit...

#COP29

Climate conferences are dying. How to save the world now? This year’s U.N. climate change summit wore its contradictions and failings on its sleeve, prompting existential anxiety.

Great reporting by Karl Mathiesen on #COP29 - and the promises and flaws of multilateral climate negotiations...
www.politico.eu/article/clim...

Trump allies want to resurrect ‘red teams’ to question climate science The idea includes compelling the National Academies to put together a team of researchers to debate the reality of climate change.

"The idea assumes there is significant debate among scientists that humans are driving the planet to dangerous levels of warming through the burning of fossil fuels. There isn’t."

www.eenews.net/articles/tru...

Why Oil Companies Are Walking Back From Green Energy As leaders gather for a global climate summit, investors are rewarding oil giants like Exxon Mobil that did not embrace wind and solar.

#but

"Scientists say every fraction of a degree of warming caused by fossil fuels brings greater risks from deadly heat waves, wildfires, drought, storms and species extinction. But investors are focused on making money over months and years." www.nytimes.com/2024/11/18/b...

⬇️
bsky.app/profile/dzar...

NYC placed under drought warning as reservoirs dry up, fire risk high The restrictions, meant to curtail more fires and conserve the city’s water supply, will mandate that city and state agencies take actions that mean fleets of LIRR, MetroNorth and MTA trains …

NYC upgrades to a drought warning. Conserve water, folks! 🌧️

www.nydailynews.com/2024/11/18/n...

Region 1 USATF Cross Country Championships #onStatenIsland

The youth cross country world has descended #onStatenIsland today for the regional championships at the Ocean Breeze Athletic Complex… #USATF

Good luck to all the runners!

Columbia climate officer talks ongoing drought Daniel Zarrilli joined "Weekends on 1."

After the driest October on record, NYC is now in a drought watch, with brush fires popping up and causing poor air quality in the five boroughs. I spoke with Roger Clark at NY1 today about what it all means - and the climate connection. Check it out ⬇️

ny1.com/nyc/all-boro...

Meet Daniel Zarrilli, Chief Climate & Sustainability Officer at Columbia University Meet Daniel Zarrilli, Columbia University’s first Chief Climate & Sustainability Officer! At Columbia, Zarrilli leads and coordinates the University’s…

At Columbia, we are building on a rich legacy of research and knowledge to embed climate action and sustainability excellence into every aspect of our work.

Check out this video to learn more: vimeo.com/1011032470

#ColumbiaClimateWeek #ClimateWeekNYC

⚡️ Check out my conversation with the NewYork ISO about New York's climate risk and the path forward on resilience, phasing out fossil fuels, and environmental justice. #PowerTrends
www.nyiso.com/-/podcast-ep...

How New York City's infrastructure handles heavy rain and flooding | Latest Weather Clips | FOX Weat... Daniel Zarrilli, special climate advisor with Columbia University, explains why some areas of New York City are more prone to flooding. Sept. 29, 2023.

I talked with Fox Weather about the flooding in NYC, the state of our infrastructure, and the role of climate change in making these storms worse.

Check it out: www.foxweather.com/watch/play-6...

Climate Week begins amid continued calls to end use of fossil fuels Dan Zarrilli joins News All Day.

Earlier this week, I joined Shannan Ferry on NY1 to talk about #ClimateWeekNYC, recent floods and fires, and how the pressure is building to phase out coal, oil, and gas.

Watch it here: ny1.com/nyc/all-boro...