Nerd Alert: The Science of Sustainability Advertising

Summary

The Marketing Architects — “Nerd Alert: The Science of Sustainability Advertising”

Date: March 5, 2026
Hosts: Linda Jasper & Rob Demar

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Episode Overview

This episode dives deep into the research on sustainability advertising, aiming to answer two central questions: What actually makes sustainability advertising effective, and why is there a gap between what consumers say about sustainable brands and what they actually do? Hosted by Linda Jasper and Rob Demar, the conversation is rooted in a comprehensive literature review by Shelley Rathi and Tyler Milfeld, shedding light on decades of academic studies and offering actionable insights for marketers.

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Key Discussion Points & Insights

1. Consumer Interest vs. Actual Behavior

• Linda quizzes Rob: What percentage of consumers say they want to buy sustainable brands?
  • Rob guesses 70%.
  • Linda: “You're so close. It's 65%.” (01:43)
• How many actually buy?
  • Rob guesses 10%.
  • Linda: “Okay, it's 26%.” (01:57)
  • Rob: “Wow.”
  • This reveals the classic attitude-behavior gap: People’s stated intentions don’t always translate to action.
  • Quote (02:06):
    • Rob: “Say one thing, they do another.”
    • Linda: “Yes, exactly.”

2. Defining Sustainability: It’s Not Just CSR

• Distinction: Sustainability is long-term, whereas Corporate Social Responsibility (CSR) is often a short-term or brand-building exercise (e.g., donations, partnerships).
• Sustainability advertising: Ads that promote sustainable initiatives, practices, or products.
• Most messaging still focuses on environmental aspects—few can readily recall strongly sustainable brands.
  • Linda: “For sustainability in particular... nothing really [comes to mind,] nothing really.” (03:33)

3. The Framework for Effective Sustainability Ads

The paper outlines three key factors:

a) Ad Context

• Effectiveness depends on cultural and global events—messages should be authentic, not opportunistic.
  • Skepticism grows if brands jump in only during crises.
• Cultural orientation matters: Community-oriented societies process sustainability differently than individualistic ones like the US.
• Younger vs. older consumers respond differently.

b) Source Characteristics

• Brand reputation and industry context: Consumers are more skeptical of sustainability claims from brands with histories contradicting such values (e.g., fast fashion).
• Third-party certifications: These can boost trust, but overuse backfires.
  • Linda: “Consumers often trust third party cues, like a certification... but those cues can also backfire when they're overused... there’s sort of a sweet spot.” (05:06)

c) Message Design

• Concrete over abstract: Specific, verifiable claims perform better than vague promises.
  • Linda: “First, concrete beats abstract... those are going to outperform vague promises.” (05:43)
• Fear appeals are risky: Such messages may raise awareness but harm trust and brand favorability.
• The “Sustainability Liability”: Consumers often assume sustainable products are less effective.
  • Rob (06:29): “That's why I'm going for the Charmin and not the seventh generation, to be quite honest with you.”
  • Linda: “If your ad only talks about sustainability and doesn't talk about product performance, you're probably going to have a tough time…” (06:34)

4. Explaining the Attitude-Behavior Gap

Three reasons the gap persists:

1. Inconvenience: Sustainable options feel harder or are seen as costlier.
2. Habitual buying: Most purchases are automatic—sustainability rarely drives the decision.
3. Limits of advertising: Messaging alone can’t change entrenched behaviors.

5. Practical Tips for Marketers

Linda summarizes the research recommendations:

• Message must match reality: Consumers spot greenwashing.
• Don’t sacrifice performance: Product effectiveness stays paramount.
• Less is more: Too many sustainability claims reduce credibility.
• Long-term commitment: Sustainability messaging should be consistent, not just a campaign.
  • Linda: “Too many claims about sustainability will reduce your credibility. Pick one or two specific verifiable things and then own them.” (07:48)

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Notable Quotes & Memorable Moments

• Rob on sustainable product skepticism:
  • “That's why I'm going for the Charmin and not the seventh generation, to be quite honest with you.” (06:29)
• Linda on the head-heart problem in ads:
  • “Most sustainability ads fail for the same reason fad diets fail. Too much morality, not enough reality.” (08:40)
• Rob on cost sensitivity:
  • “It almost becomes like a tax on the consumer that, okay, if you want to make this sustainable choice, you need to be willing to pay more for it.” (08:54)
• Linda on culture:
  • “We live in the United States, which tends to be more individualist. So maybe that's why we also can't think of a lot of examples, because it's just less of a common message here.” (09:42)

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Timestamps for Key Segments

• 00:43 — Introduction to the featured research paper and its core questions
• 01:29–01:59 — Consumer intent vs. actual purchasing stats
• 02:08–03:56 — Definitions: Sustainability vs. CSR; challenges recognizing sustainable brands
• 04:06–07:40 — The framework: ad context, source, and message design
• 06:29 — “Sustainability liability” and perceptions of product quality
• 07:40–08:51 — The attitude-behavior gap: why the disconnect persists
• 08:51–09:42 — Price sensitivity and cultural considerations

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Final Takeaway

Sustainability advertising is hard to do well. The science shows that authenticity, specific claims, proven product performance, and consistency over time are what separate memorable sustainable brands from the noise. However, skepticism, perceptions of inconvenience or higher cost, and a tendency for sustainability messaging to focus too much on morality and not enough on practical benefit all hinder progress. Brands win by making sustainability feel tangibly rewarding, not just virtuous.

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For marketers:
“Lead with what the product does well and then layer in the sustainability story.” (07:11, Linda)

Summary by The Marketing Architects

Transcript

[A]

Nerd alert. Learning is important, right?

[B]

Yes, exactly. What a bunch of nerds.

[A]

Nerd alert.

[B]

Marketing Architects. Hello and welcome to the Marketing Architects, a research first podcast dedicated to answering your toughest marketing questions. I'm Linda Jasper on the marketing team here at Marketing Architects, and I'm joined by my co host. Rob Demar is the chief product architect of misfits and machines.

[A]

Hey, Elena.

[B]

Hello. We are back with your weekly Nerd Alert. Every week, I'll take a deep dive into academic marketing research and translate its complex ideas into simple, understandable language for Rob, and of course, for all of you. Are you ready to nerd out, Rob?

[A]

I'm about to geek out so hard that my high school bully just woke up in a cold sweat somewhere.

[B]

All right, let's get into it. As always, we'll link the research we cover in the episode notes. This week I read a paper titled Sustainability Advertising A Literature Review and Framework for Future Research. It was published in the International Journal of advertising in 2023 by Shelley Rathi and Tyler Milfeld from Villanova University. And yes, this was inspired by having Tyler on the podcast. A couple of weeks ago, I had to go dig into more of what he's done. Now, this isn't just one study. It's decades of sustainability research all summarized. But the authors are asking two tough questions. First, what actually makes sustainability advertising work? And second, why do some people adopt sustainable behaviors while others do not? But before I get too far, Rob, I wanted to ask you, what percentage of consumers do you think say they want to buy sustainable brands?

[A]

I was really tempted to cheat and look this up beforehand, but I didn't. So I know I'm going to be super wrong, but I am going to go with probably because it's a safe bet. 70%. 70% of people say they care.

[B]

You're so close. It's 65%.

[A]

Oh, there we go.

[B]

Yeah, you're basically right on. All right, now, how many do you think actually buy sustainable brands?

[A]

I think, and this is me being generous, 10%.

[B]

Okay, it's 26%.

[A]

Wow.

[B]

So it's a little higher.

[A]

I was off.

[B]

But still, you're right on with the. You're on it with what this is saying. It's a massive gap.

[A]

Say one thing, they do another.

[B]

Yes, exactly. Talked about that before. All right, well, let's get in. Let's get into the study. I wanted to start with a distinction. Sustainability is not the same thing as CSR or corporate social responsibility. CSR is often just thought of as more short term. It's things like donations, the partnerships, the campaigns that make your company look responsible. Sustainability is supposed to be more long term, hence sustainability. So the authors, they define sustainability advertising as ads that explicitly promote sustainable initiatives, practices, products, or behaviors. Most research and most advertising has focused entirely on sort of the environmental side. So, Rob, when you think of a sustainable brand, what comes to mind?

[A]

Okay, I did do research on this one because I was totally wrong. For some reason I just thought toilet paper brands were going to be very environmental, you know, like the whole circle of life thing, you know, and they're recycling the paper and whatever. And I was totally wrong because I'm thinking, oh, like seven generation. I do think of, you know, not just for toilet paper, but they seem to be, you know, waving that flag.

[B]

So you would say it sounds like it was a little difficult. You do some research. Like there wasn't really one.

[A]

I did, I didn't just all of a sudden go bang.

[B]

Yeah. For sustainability in particular.

[A]

Yeah.

[B]

Kind of hard to think of. Yeah. So that makes sense. How about me?

[A]

Yeah, does it? Did you have a brain that just immediately pops into your brain?

[B]

Honestly, I was with you. The only one I had was seventh generation, and only because Professor Millfeld came on the podcast and said that as an example a few weeks ago was the only reason that I thought of them. So, no, I had the exact same same problem. I can think of brands that do more of the like, brand activism come to mind, but not. No, not sustainability in, in general. No, nothing. Nothing really.

[A]

I suppose Apple does like to tout their zero, whatever, all recycled stuff. So I guess they, they kind of come to mind now that I think about it.

[B]

But yeah, I can think of a lot of like, organic brands or things like that. But not like sustainability in general. Well, as we'll see from this paper, sustainability advertising is not entirely easy to get. Right. So the authors, they looked at just different ways sustainability could show up from a brand or an advertising, and then they looked at specifically, like, what makes those ads work. The core of this paper is a framework with three main ad context, source characteristics, and message design. So let's start with ad context. Sustainability ads don't exist in a vacuum. They're shaped by what's happening around us. So global crises increase interest in sustainability, but brands can't just show up when it's convenient. So if you're going to have a sustainability message, it should feel authentic, not reactive. If it feels reactive, people are going to be skeptical of it, which makes sense. There's also a cultural layer in Cultures that prioritize community sustainability messaging lands differently than in individualist cultures. Younger consumers also respond differently than older ones. Also, most research has been done in North America and Western Europe, and huge gaps remain how these ads land elsewhere. Second, source characteristics. So this one is a little uncomfortable for big brands. Consumers don't trust sustainability messages equally. Your industry you're in, your brand's reputation and your brand's history all matter. So for example, if your fast fashion brand starts talking about sustainability, people are probably going to think, what the heck. Luxury brands are sometimes believed, but at the cost of perceived exclusivity. And purpose built brands can be seen as more authentic. So here's something interesting. Consumers often trust third party cues like a certification. Your brand has an independent label more than your brand's own claims. But those cues can also backfire when they're overused. So there's sort of a sweet spot. And finally, we have message design. This is where most brands tend to make mistakes in sustainability messaging. So things to keep in mind. First, concrete beats abstract. So if you can share specific verifiable claims, those are going to outperform vague promises. Second, fear is very risky. Fear appeals can increase awareness, but they often decrease brand favorability and trust. And third, sustainability can hurt perceived product performance, which I thought was so interesting. So there's something called the sustainability liability, which say that 10 times fast consumers often assume sustainable products are less effective. And honestly, I'm right, I might have to admit. I mean, sometimes I think that a lot.

[A]

That's why I'm going for the Charmin and not the seventh generation, to be quite honest with you.

[B]

Right? Because sometimes you assume, like when you think about like recycled toilet paper or something like that, you kind of assume it's going to fall apart a little bit, right? So they're saying, okay, that's a risk. So if your ad only talks about sustainability and doesn't talk about product performance, you're probably going to have a tough time with that advertising. All right? And then we have this attitude and behavior gap. So think about the stat from the beginning. 65% of us say we want to buy sustainable brands. Only 26% of us actually do. That gap exists for three reasons that they called out. First, sustainability often feels inconvenient, it's perceived as more expensive, and it's rarely the primary purchase driver. Second, most buying is habitual. So sustainability is usually a secondary factor for us when we're purchasing something. Usually we're just buying whenever we plan to. And that means that third, advertising Alone can't carry the load if you're trying to be a sustainable brand. All right, so what does this mean for someone who wants to invest in sustainability advertising? First, make sure your message matches reality. Consumers have pretty good BS detectors. Second, performance still matters. So don't just trade effectiveness for ethics in your messaging. Lead with what the product does well and then layer in the sustainability story. Third, less is more. Too many claims about sustainability will reduce your credibility. Pick one or two specific verifiable things and then own them. And fourth, think long term sustainability advertising works best when it's consistent, not campaign based. So this shouldn't be a one and done message. So there's, there's an opportunity for brands if they want to take it. But going through the study, I started to think this is why we probably don't see a ton of sustainability advertising, or at least we can't, we can't remember it. But quick Rob GPT sustainability advertising is like trying to get someone to eat healthier. Most brands lead with this is better for you. Long term benefits, responsibility, all head, no heart. But the first question everyone asks is still, does it taste good? So if the sustainable option feels harder, worse or more expensive, people won't stick to it, no matter how virtuous it sounds. The brands that win don't make you feel guilty. They prove the product works first. They make the sustainable choice feel easy, normal, and just as satisfying as the old one. Most sustainability ads fail for the same reason fad diets fail. Too much morality, not enough reality. I mean. Chatgpt, There you go.

[A]

That's a good one.

[B]

Yeah. What do you think?

[A]

Did it ever go into cost sensitivity as well in the GPT? Brought it up for a second, but it seems like there would be a perceived cost increase in choosing a brand that's making those types of choices and almost becomes like a tax on the consumer that, okay, if you want to make this sustainable choice choice, you need to be willing to pay more for it.

[B]

You know, I don't, I don't remember that specifically. It might have been a part of it. But yeah, that's, that's interesting because that is something. I assume if something's sustainable, it must be more expensive, which probably makes it tougher as well, especially for people who

[A]

are like, gosh, I want to choose the more sustainable one, but I choose my pocketbook first. Which is kind of a reality that people need to, to deal with.

[B]

Yeah. Where if your brand can find that, that'd be, I mean, that's the sweet spot, is if you can focus on product performance without it becoming too expensive. But, yeah, you start to see why it's hard for brands to adopt this kind of kind of messaging. There's just a lot of skepticism that comes with it. And that was interesting, too, about the communal versus individualist cultures. Like, we live in the United States, which tends to be more individualist. So maybe that's why we also can't think of a lot of examples, because it's just less of a common message here. But, yeah, I thought it was really interesting.

[A]

Good one.

[B]

That's it for this episode of the Marketing Architects. We'd like to thank Taylor De Los Reyes for producing the show. You can connect with us on LinkedIn. And if you like the podcast, please leave us a review. Now go forth and build great marketing. Marketing Architects.