Biomass Vs Fossil Fuels: Powering New Zealand’s Future

Thursday, 28 August 2025, 6:06 pm
Press Release: Tubman Heating

As New Zealand navigates its path toward a sustainable, low-emissions future, the debate between fossil fuels and biomass as energy sources has become increasingly pertinent. With the nation’s commitment to achieving net-zero emissions by 2050, understanding the distinctions between these energy sources is crucial for informed decision-making.

Fossil Fuels: The Traditional Powerhouse

Fossil fuels—coal, oil, and natural gas—have long been the backbone of global energy systems, including New Zealand’s. They are energy-dense and have historically provided reliable power for electricity generation, transportation, and industrial processes.

However, their environmental and economic drawbacks are significant:

• Greenhouse Gas Emissions: Burning fossil fuels releases substantial amounts of carbon dioxide (CO), contributing to climate change. In New Zealand, energy sourced from fossil fuels accounts for approximately 40% of the country’s greenhouse gas emissions. (EECA)
• Energy Security Concerns: New Zealand relies on imported fossil fuels for about 38% of its primary energy, making it vulnerable to international market fluctuations and supply disruptions. (SpringerLink)
• Environmental Risks: Fossil fuel extraction and use can lead to environmental degradation, including habitat destruction and water pollution.

Recent Gas Supply Challenges in New Zealand

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Adding urgency to the transition from fossil fuels, New Zealand faces significant concerns regarding its natural gas supply. Recent data from the Ministry of Business, Innovation and Employment (MBIE) indicates that natural gas reserves have been reduced faster and sooner than previously forecast. As of January 1, 2025, proven plus probable (2P) natural gas reserves were down 27% compared to the previous year. This reduction is largely attributed to field operators reducing their estimates of readily extractable gas.

Previous forecasts predicted annual gas production would fall below 100 petajoules (PJ) by 2029, but revised estimates now project this level will be reached by as early as 2026. This decline in domestic gas production has led to increased energy costs, putting pressure on industries reliant on gas for process heat (such as milk drying, timber processing, and steel production), and has seen electricity generators resort to more coal and diesel to meet demand. The government has acknowledged this as a “stark reminder” of the need for secure and affordable gas, leading to policy shifts including overturning the 2018 ban on new offshore oil and gas exploration and exploring options for Liquefied Natural Gas (LNG) imports.

This dwindling domestic gas supply further underscores the precariousness of relying on fossil fuels. It highlights the critical need for New Zealand to accelerate its shift towards alternative, more secure energy sources like biomass.

Biomass: A Renewable Alternative

Biomass energy is derived from organic materials such as wood, agricultural residues, and waste. In New Zealand, biomass accounts for around 7% of total primary energy use, with expectations to increase to 12–14% by 2035. (EECA)

Key advantages of biomass include:

• Carbon Neutrality: Biomass is considered carbon-neutral because the CO released during combustion is offset by the CO absorbed during the growth of the biomass source. (bioenergy.org.nz)
• Utilization of Waste: Biomass energy can be produced from waste materials, reducing landfill use and associated methane emissions.
• Economic Opportunities: Developing the biomass sector can create jobs in rural areas and provide additional income streams for farmers and forest owners. (usewoodfuel.org.nz)

Comparing Fossil Fuels and Biomass

Heating Costs at a Glance: A Fuel Comparison

* Please note that all costs and pricing are subject to change. The prices listed are correct as of 05.08.2025 but are continually rising, with potential variance due to fluctuating transport costs for fuels, especially biomass and gas.

The New Zealand Context

New Zealand’s energy landscape is evolving. The country has abundant biomass resources, particularly from its forestry sector, which can be harnessed for energy production. Transitioning to biomass and other renewable energy sources aligns with national goals to reduce greenhouse gas emissions and enhance energy security.

However, challenges include investment in biomass processing infrastructure and ensuring sustainable sourcing practices. Moreover, policy support and public acceptance are crucial for the successful integration of biomass into the energy mix.

Conclusion

While fossil fuels have historically powered New Zealand’s growth, their environmental and economic drawbacks necessitate a shift toward cleaner alternatives. Biomass presents a viable, renewable option that can contribute to a sustainable energy future. By investing in biomass energy, New Zealand can reduce its carbon footprint, enhance energy security, and stimulate rural economies, aligning with its commitment to a greener future.

Interested in exploring sustainable energy solutions?

Contact Tubman’s team today to learn more about biomass and renewable alternatives.

This article first appeared at: https://tubman.co.nz/blog/industry-news/fossil-fuels-vs-biomass-powering-new-zealands-future/

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