Australia invests $53M in biomass for cement, raising environmental concerns

Australia’s push towards cleaner energy sources has taken a controversial turn with the government’s decision to invest nearly $53 million in a Tasmanian project. The initiative involves transitioning a coal-fired kiln to burn wood waste and used tyres for cement production, a move that has sparked debate over its environmental impact.

Federal Minister for Climate Change, Chris Bowen, asserts that this investment aligns with efforts to decarbonise the economy. However, scientific studies indicate that burning forest biomass produces significant carbon emissions and could harm forest health.

Rationale Behind the Initiative

Global commitments to the Paris Agreement push nations to seek alternative energy sources to reduce fossil fuel reliance and curb global warming. Industries like concrete manufacturing are particularly in focus due to their high carbon footprint. The production process, especially the creation of clinker, is responsible for a large portion of concrete emissions.

Despite being promoted as a renewable energy source, forest biomass often consists of essential forest components, like understorey vegetation and fallen logs, which are critical for biodiversity and carbon storage. Burning this biomass releases considerable amounts of carbon dioxide, and the effects linger for centuries.

Environmental and Economic Impacts

The time it takes for carbon released from biomass burning to be reabsorbed by new growth is a major concern. This delay exacerbates climate change, undermining efforts to meet Paris Agreement targets. Furthermore, the need to burn large amounts of biomass for energy contributes to forest degradation.

While the native forest sector struggles due to its reliance on low-value products like woodchips, the plantation sector focuses on high-value timber. State agencies face challenges in obtaining market certification for wood products, partly due to the biodiversity in logged areas.

Broader Implications

This project is not unique. Plans are underway for Verdant Earth Industries to revive the Redbank Power Station in New South Wales using similar methods. Critics argue that burning what is labeled as “wood waste” could threaten ecosystems and species dependent on forest regrowth.

As Australia commits to ending deforestation by 2030, the environmental costs of using forest biomass for energy need to be weighed against potential benefits. Exploring truly clean energy options like concentrated solar power might offer a more sustainable path.

A response was sought from Cement Australia.