Sustainability Defined

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Sustainability Defined

Sustainability Defined is the podcast that defines sustainability, one topic (and one bad joke) at a time.

Hosts Jay Siegel and Scott Breen explore a new topic each episode with the help of an expert in the field. Each concept falls into one of seven sectors - Energy, Cities, Natural Environment, Transportation, Business, Policy, and Social - and is visually represented in a Sustainability Tree found at www.sustainabilitydefined.com.

12/07/2026

Host Spotlight Moment ✨

HAPPY SUNDAY MORNING! Hi Definers it’s me, your co-host Cecilia! This Sunday morning I’m spending it at the farmers market in Duponte Circle DC, because it’s Peach season!!

Comment down below your favorite seasonal produce at the farmers market!

10/07/2026

💚 100 episodes later, and we’re feeling incredibly grateful. 💚

What started as a simple idea to make sustainability more accessible and understandable has grown into a community of curious, passionate people committed to learning and driving positive change.

To our listeners: thank you for tuning in, sharing episodes, asking thoughtful questions, and being part of every conversation. Whether you’ve been with us since Episode 1, joined us this year, or discovered the podcast somewhere in between, we’re so glad you’re here.
And to the incredible guests who have shared their expertise, experiences, and perspectives with us over the past 100 episodes, thank you for helping us explore sustainability from every angle.

Here’s to 100 episodes of learning, questioning, and growing together, and to the next chapter of the journey!!!!! 🌎🎙️

With love,
The Sustainability Defined Team

P.S
Comment down below your favorite episode yet!!

07/06/2026

Your peanut butter has a supply chain and it’s more interesting than you’d think. In the latest episode of Hot Commodities, we traced the journey behind one of the world’s most beloved everyday commodities: the peanut.

From organic farming and water use to fair sourcing, processing, and global supply chains, we get into what responsible food production actually looks like in practice — and what consumers can do to make more sustainable choices at the grocery store.

Once Again has been doing things differently since 1976 — 100% employee-owned, directly sourcing from farmers and co-ops, and making nut butters with ingredients you can actually pronounce. Oh, and their mascot is a raccoon named Rocky who grew up on the factory grounds. We love them. 🦝🥜

🎙️ Full episode out now, link in bio!

05/06/2026

🎉 We’re celebrating a major milestone: Episode 100 of Sustainability Defined! 🎉

Before we dive in, a huge thank you to all of our incredible Definers who have been part of this journey. Thank you for listening, learning, and helping us build a community dedicated to making sustainability more accessible.

For this special episode, we’re bringing back our Hot Commodities series with Sudheer Kosaraju, Chief Commercial Officer at . Together, we explore the story behind one of the world’s most beloved (and nostalgic) snacks: peanuts. 🥜

From farming and water use to sourcing, processing, and global supply chains, we unpack the complex sustainability challenges behind this everyday commodity.

We also discuss what responsible agricultural practices look like and how consumers can make more sustainable choices at the grocery store.

🎧 Tune in now and celebrate Episode 100 with us!

11/05/2026

Host Spotlight ✨ featuring Cecilia:

Hi Definers, it’s your co-host Cecilia and this week I am inviting you to spend a lovely Sunday at the farmers market with me! This past Sunday was powered by they are a Mexican clean beauty brand committed to 100% plastic free packaging and removing plastic waste from our oceans!

Let me know your favorite weekend sustainable activities, baked goods recipes, and how you romanticize your sundays!

BONUS: let me know how many smiskis you can find in this video 🤭🤗

06/01/2026

Cecilia went on another podcast and we had to share

From:
🌎 loving environmental science as a kid
🎓 to grad school at Georgetown
🎙️ to hosting Sustainability Defined

This convo hits on:
• why sustainability is everywhere
• why being “perfect” isn’t the goal
• why voting with your dollar actually matters
• and yes… the Lorax made an appearance 🧡🌳

Real talk about climate work, careers, and figuring it out as you go.

06/01/2023

From the carrots you're munching on to the chocolate in your grande extra-whip double-mocha latte (no judgment), use underpins most everything we eat on a daily basis. In fact, agriculture on average accounts for 70% of all freshwater withdrawals globally - enough to cover the entire United States in 2 feet of water each year. Join us as we unpack this critical issue with the help of Ashwin Madgavkar, founder of , an innovative spectral imaging company and 2020 recipient working to optimize agricultural water use around the world. Enjoy!

04/11/2022

Looking for your customary first-Friday-of-the-month new episode? Don’t you worry! We’ve got a bonus episode coming your way this month followed by our classic Holiday Hodge Podge on December 2nd. See you soon!

13/10/2022

Our job posting on LinkedIn hit its limit, BUT we’re still accepting applications for our Research and Operations Director role through Friday, October 14th. Please share/apply and come armed with your best bad jokes! #

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