Why Most Net Zero Marketing Fails

What credible climate communication actually looks like

“Net Zero” used to sound ambitious.

Now it often sounds automated.

The phrase appears everywhere, annual reports, homepage banners, investor decks, airport billboards, but increasingly, audiences are asking the same question:

What does this actually mean?

That’s the credibility problem facing climate communication right now.

Companies aren’t necessarily communicating less about sustainability. In many cases, they’re communicating more. But the gap between claims and clarity is widening, and audiences are getting better at spotting vague language, inflated ambition and sustainability messaging that feels designed more for compliance than comprehension.

The result? A growing trust recession in climate communications.

And for brands genuinely doing meaningful work, that’s becoming a serious problem.

Because when every company claims climate leadership, credibility becomes the differentiator.

Why net zero messaging is starting to fail

A lot of sustainability communication now follows the same formula:

• announce an ambition
• include a future target
• mention innovation
• avoid specifics
• hope nobody asks follow-up questions

The issue isn’t always intentional greenwashing. More often, it’s ambiguity.

Terms like “net zero”, “carbon neutral” and “climate positive” have become so overused, and so inconsistently applied, that they’re beginning to lose signalling power altogether.

That matters because public scrutiny is increasing rapidly.

Regulators are tightening sustainability disclosure expectations. Media scrutiny around climate claims is intensifying. Investors are becoming more sceptical of vague ESG language. And consumers are increasingly aware that ambitious climate promises without evidence don’t mean much.

In other words:

climate communication is entering its accountability era.

What “credible” actually means now

Credible climate communication doesn’t mean perfect communication.

It means communication that is:

• specific
• evidence-based
• transparent about limitations
• aligned with recognised standards

Importantly, credibility is no longer built through ambition alone.

It’s built through proof.

What is “net zero”?

Net zero refers to reducing greenhouse gas emissions as much as possible, while balancing any remaining emissions through verified removals or offsets.

Under Science Based Targets initiative (SBTi) guidance, credible net zero pathways prioritise:

• deep emissions reductions first
• limited reliance on offsets
• transparent timelines and reporting

What is “carbon neutral”?

Carbon neutral generally refers to balancing emissions through offsets.

Unlike net zero, carbon neutral claims have historically been applied more loosely, which is partly why they now face increasing scrutiny from regulators and NGOs.

The distinction matters.

Because audiences are becoming more sophisticated about climate terminology, and vague sustainability language increasingly creates reputational risk.

A practical framework for credible net zero marketing

At Third Hemisphere, we think strong climate communication now depends on three things:

1. Evidence

The fastest way to weaken credibility is to make sustainability claims without visible proof.

If a company says it is “committed to net zero”, audiences immediately want to know:

• by when?
• measured how?
• validated by whom?
• against what baseline?
• with what progress?

Evidence can include:

• science-based targets
• emissions disclosures
• transition plans
• third-party verification
• annual progress reporting

The goal isn’t to overwhelm people with data.

It’s to show the claim is attached to something measurable.

2. Specificity

A lot of climate communication collapses under vague language.

Phrases like:

• “driving sustainable outcomes”
• “accelerating climate leadership”
• “building a greener future”

…often communicate almost nothing.

Specificity builds trust because it signals operational reality.

Compare:

Weak

“We are committed to sustainability across our operations.”

Stronger

“We aim to reduce Scope 1 and 2 emissions by 42% by 2030, aligned with SBTi guidance.”

One sounds like brand positioning.

The other sounds accountable.

3. Transparency

This is the piece many organisations still struggle with.

The instinct in corporate communication is often to sound fully in control. But in climate communication, over-polished certainty can actually reduce trust.

Audiences now respond better to companies that acknowledge:

• complexity
• trade-offs
• limitations
• ongoing work

In other words:

transparency is becoming more persuasive than perfection.

That includes being honest about:

• where targets are progressing
• where challenges remain
• what is still evolving

Some sustainability reports now contain enough disclaimers to qualify as emotional support documents for legal teams. But overly defensive communication creates its own credibility problem.

Clear, honest language performs better than hyper-managed ambiguity.

Good vs bad examples of net zero communication

Less credible

“We are leading the transition to a sustainable future through innovative climate solutions.”

Why it struggles:

• vague
• generic
• unmeasurable
• no evidence
• sounds interchangeable with hundreds of other claims

More credible

“We have committed to reducing operational emissions 50% by 2030 and achieving net zero by 2045, with targets validated by the Science Based Targets initiative.”

Why it works:

• measurable
• specific
• time-bound
• externally validated

The difference isn’t the tone.

It’s clarity.

The new rules of climate communication

The sustainability landscape has changed significantly over the past few years.

Earlier climate communication rewarded:

• ambition
• positioning
• future vision

Now audiences increasingly reward:

• evidence
• transparency
• specificity
• operational detail

That doesn’t mean brands should stop telling compelling stories.

It means storytelling now needs stronger foundations underneath it.

Because sustainability messaging that feels disconnected from measurable action is becoming easier, and faster, to dismiss.

A checklist for credible net zero communication

Before publishing sustainability claims, ask:

• Is the claim specific?
• Is there measurable evidence attached?
• Are timelines included?
• Is terminology being used accurately?
• Are standards or frameworks referenced?
• Is progress reporting publicly available?
• Are limitations or complexities acknowledged?
• Could an external audience clearly understand what the claim means?

If the answer to several of these is “no”, the messaging probably needs refinement.