Sustainability & Climate
Communicate your impact without the greenwash
The sustainability sector demands authenticity. We help cleantech companies, ESG-focused businesses, and impact organisations communicate their genuine environmental and social impact, backed by data and verified metrics.
A deep personal conviction, not a fashionable category
Third Hemisphere's sustainability and climate practice is led by deep personal conviction and professional expertise. Our Executive Chair Jeremy Liddle has spoken at the UN General Assembly and the G20 Summit on the role of strategic communications in driving climate action. Our senior team includes award-winning climate media specialists and former documentary makers whose work on environmental issues has reached millions. Sustainability is core to who we are, and it has been since long before the category became fashionable.
Supporting cleantech through critical growth stages
We have supported some of Australia's most significant cleantech companies through critical growth stages. For Gelion, we managed communications through their ASX listing, translating complex zinc-bromine battery technology into an investment narrative that attracted institutional interest and secured Bloomberg and Reuters coverage. For HB11 Energy, we helped communicate their breakthrough laser fusion technology to investors and media, supporting a $20 million capital raise. For Hydgene Renewables, we positioned their hydrogen fuel cell technology to cleantech investors and government agencies. For Australian Ethical, we helped articulate the performance case for ethical investing to mainstream financial media.
Sustainability communications are uniquely treacherous
Sustainability communications are uniquely treacherous. ASIC and the ACCC are actively pursuing greenwashing claims. Consumers and investors are increasingly sophisticated in identifying empty environmental claims. Third Hemisphere manages this risk by insisting on evidence-based communications: every claim backed by data, every metric verified, every narrative grounded in genuine outcomes. We tell our clients what not to say as often as we advise on what to say.
Three more engagements built on the same discipline
Three more engagements sit alongside those investor stories. For Fremantle Seaweed, we measured and improved how AI engines represent an ocean-farming venture, connecting climate-technology credibility to the AI-visibility work buyers now rely on. For Sicona Battery Technologies, we built media coverage for a critical-minerals and battery-materials company competing for capital in a crowded decarbonisation supply chain. For Circulate Capital, we supported communications for a fund investing in the circular economy across South and Southeast Asia. Each required the same discipline: verify the claim before we publish it, then find the audience that needs to hear it.
Industry challenges
- Avoiding Greenwashing While Being Compelling The line between authentic sustainability communication and greenwashing is thinner than most organisations realise. ASIC and the ACCC are actively pursuing companies making unsubstantiated environmental claims. Communications must be compelling without being misleading.
- Translating Complex Science into Accessible Narratives Cleantech and climate technology companies often struggle to communicate their innovation without either oversimplifying the science or drowning audiences in technical detail. The narrative must be accurate and accessible simultaneously.
- Engaging Multiple Audiences Sustainability companies communicate with investors, regulators, media, customers, policymakers, and the public, each with different levels of understanding, different priorities, and different sensitivities around environmental claims.
- Connecting Technology to Impact Investors and media want to understand what the technology does and what difference it makes. Quantifying environmental impact in credible, relatable terms is essential for attracting capital and building public support.
What we deliver
Third Hemisphere brings a unique combination of senior climate leadership, award-winning environmental media expertise, and deep technology communications capability. We help cleantech companies, ESG-focused businesses, and impact organisations communicate their genuine environmental and social impact through evidence-based media relations, investor communications, and thought leadership programs. Our senior team brings decades of climate media experience and award-winning environmental media production. Our Executive Chair Jeremy Liddle has spoken at the UN General Assembly and the G20 on sustainable development communications. This is a team that lives and breathes climate action. We apply that depth of expertise to every sustainability communications engagement, ensuring your messaging is authentic, evidence-based, and strategically positioned within the broader policy and market context.
Where a sustainability or climate client also needs AI visibility, we run the same PACT diagnostic we use across the agency: 50 real buyer and investor questions asked across ChatGPT, Claude, Gemini, Copilot, Perplexity, Google AI Mode, and Google AI Overviews, scored for Presence, Advocacy, Consensus, and Truth. Climate and cleantech categories are moving fast enough that an inaccurate or outdated AI answer can cost a company capital or a customer before anyone at the company knows the answer is wrong.
- Evidence-based media relations targeting sustainability, financial, and technology journalists
- ESG reporting communications and sustainability narrative development for investors and regulators
- Executive thought leadership positioning at climate conferences, UN forums, and industry events
- Investor communications for cleantech capital raises, IPOs, and government grant applications
- Greenwashing risk assessment and compliant communications frameworks
- Content marketing including impact reports, climate policy commentary, and case studies
How does Third Hemisphere avoid greenwashing in sustainability communications?
Third Hemisphere focuses on verifiable facts, specific metrics and third-party certifications. Every claim we make in communications is backed by evidence. We also advise on what not to say, helping organisations avoid vague or unsubstantiated claims that could attract regulatory scrutiny or public backlash.
Does Third Hemisphere work with the UN and international bodies?
Yes. Third Hemisphere's Executive Chair Jeremy Liddle has spoken at the UN General Assembly and the G20, advocating for the role of communication in driving climate action and social impact. Third Hemisphere is a PR partner for the UN Global Compact Network Australia.
What types of sustainability organisations does Third Hemisphere work with?
Third Hemisphere works with cleantech companies, renewable energy businesses, ESG-focused enterprises, carbon market platforms, impact investors, circular economy startups, and non-profit organisations focused on environmental and social outcomes across Australia and the Asia-Pacific region.
Can Third Hemisphere help with ESG reporting communications?
Yes. Third Hemisphere helps organisations communicate their ESG performance to investors, regulators, media and the public. We develop ESG narratives, sustainability report communications, and engagement strategies that translate complex ESG data into compelling, credible stories.
How does PR support a cleantech company's growth?
PR builds the credibility and visibility that attracts investors, partners, customers and talent to cleantech companies. Third Hemisphere positions cleantech founders as thought leaders, secures coverage in financial and industry media, and develops narratives that connect technology innovation to real-world environmental impact.
Does Third Hemisphere understand climate policy and regulation?
Yes. Third Hemisphere's team understands the policy settings around climate action, carbon markets, renewable energy incentives and ESG disclosure requirements in Australia and internationally. This expertise ensures our communications are accurate, compliant and strategically positioned within the broader policy context.
Has Third Hemisphere worked with critical minerals or battery technology companies?
Yes. Third Hemisphere built media coverage for Sicona Battery Technologies, a critical-minerals and battery-materials company, positioning its technology for the investors and manufacturers financing the battery supply chain's decarbonisation.
Does Third Hemisphere handle AI visibility for climate and cleantech brands?
Yes. For Fremantle Seaweed, we measured and improved how AI engines represented an ocean-farming venture. The Fourth Hemisphere: Marketing for AI runs the same PACT diagnostic for every climate client, scoring Presence, Advocacy, Consensus, and Truth across the seven engines.
Can Third Hemisphere help a company respond to a greenwashing allegation?
Yes. Third Hemisphere develops evidence-based response communications for organisations facing greenwashing scrutiny from ASIC, the ACCC, media, or activist investors, verifying every claim against the underlying data before it is used in any public statement.