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New open-source tool quantifies climate damage from individual fossil fuel projects

Researchers say the Carbon Impacts Tracer undermines the 'drop in the ocean' defence used by companies and governments

By LineZotpaper
Published
Read Time2 min
Sources3 outlets
Australian researchers have launched an open-source climate tool that estimates how much a new coal, gas or oil project will warm the planet and the damage it will do across eight areas, from crop losses to heatwave deaths. The developers say it challenges the long-running 'drop in the ocean' defence used to justify new fossil fuel developments.

A team from the Australian National University and UNSW have released the Carbon Impacts Tracer, a tool designed to show the specific warming contribution and harms of individual fossil fuel projects. It tracks damage across eight categories, including loss of crops and heatwave deaths in Europe.

The project responds to a persistent problem in climate governance. While governments continue to approve new fossil fuel projects amid worsening climate change, the emissions from any single development have been difficult to link to measurable harm.

Backers of new projects have often relied on the so-called 'drop in the ocean' defence: conceding that a project adds carbon dioxide to the atmosphere, but arguing the contribution is tiny compared with global emissions and that damage attributable to it is almost impossible to track.

The researchers argue this defence no longer holds. Attribution science, which identifies the role of climate change in making extreme weather and disasters more likely, has advanced rapidly in recent years. The new tracer goes a step further by applying attribution methods to project-level emissions.

The tool is intended to help make fossil fuel companies and the government agencies that approve these projects accountable for the damage they will cause.

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Analysis

Why This Matters

  • The tool could shift the burden in environmental approvals and legal challenges by tying specific projects to measurable harms, rather than treating emissions as untraceable.
  • If adopted by courts or regulators, it may make it harder for new coal, gas and oil developments to pass climate-based scrutiny.
  • It provides a publicly available resource, meaning communities, researchers and advocates can assess projects without relying on company data.

Background

For years, the core obstacle to holding individual fossil fuel projects accountable has been the difficulty of demonstrating causation. Companies and approving agencies have argued that one project's emissions are negligible against global totals, and that its specific damage cannot be isolated. That position has been tested in Australian climate litigation, where the 'drop in the ocean' argument has featured. The new tool applies recent advances in attribution science, which has matured enough to estimate how climate change amplifies specific extreme events, to the emissions of a single proposed project.

Key Perspectives

Researchers and project developers: They see the Carbon Impacts Tracer as an accountability mechanism that closes a longstanding evidentiary gap, allowing project-level damage to be quantified across multiple impact areas. Fossil fuel companies and approving agencies: These actors have historically relied on the 'drop in the ocean' defence, and may contest the tool's methodology or argue that national and global emissions frameworks, not individual projects, are the appropriate unit of analysis. Critics and skeptics: The legal and regulatory weight of a new research tool is unproven. Its real-world influence will depend on whether courts, tribunals and decision-makers accept its findings as evidence in approvals processes.

What to Watch

  • Whether the tool is cited in upcoming environmental impact assessments or court proceedings, and how it withstands legal scrutiny.
  • Any methodological challenge from industry, which could test the assumptions behind its attribution calculations.
  • Whether regulators begin requesting project-level climate damage estimates as part of approval processes.

Sources

Zotpaper

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