The gap between climate science and project-level accountability has always been one of translation. We know every tonne of CO₂ adds to warming, and every fraction of a degree increase matters — a point reinforced by a 2025 Nature study. But when a coalmine expansion in Australia's Hunter Valley gets approved, the conversation stays stuck at gigatonnes and global averages. Nobody asks: how many people does this specific facility's emissions kill? A group of climate scientists has now built the tool that forces that question. The Carbon Impacts Tracer uses peer-reviewed studies to estimate the human and environmental impact of every megatonne of emissions from a single proposed or existing facility. It takes the abstract — 809 million tonnes from a Hunter Valley coalmine expansion — and converts it into specific, attributable consequences: deaths, poverty, heat exposure, glacier loss, lost labor productivity. The numbers for that single coalmine expansion are instructive. An estimated 107 deaths in Europe. 41,800 additional people pushed into extreme poverty. 19.4 square kilometres of additional glacier area lost. 38.8 million additional heavy labour hours lost annually. These are not aggregated global statistics. They are attributed to one facility's lifetime emissions. The tool's mechanism matters as much as its output. By drawing on peer-reviewed dose-response relationships between emissions and impacts, the Carbon Impacts Tracer creates a causal chain that regulators, courts, and investors can engage with. It converts a tonnage figure — which sounds technical and remote — into a body count and a poverty count, which sounds like something a planning authority might have to justify. This is a generative capability addition to climate governance. Before this tool, the informational asymmetry was profound: project proponents could cite economic benefits in precise dollar terms while opponents could only gesture at vague global harm. Now both sides of the ledger can be denominated in human units. Whether regulators actually use it is a separate question, but the tool removes the excuse of ignorance. The strategic implications run in several directions. For litigation, it provides the kind of attributable harm estimates that climate liability cases have struggled to establish. For investors, it creates a due-diligence input that ESG frameworks have lacked — not a score, but a mortality and poverty estimate attached to a specific asset. For incumbent fossil fuel operators, it represents exactly the kind of transparency that makes project approvals harder to rubber-stamp. The tool's credibility rests entirely on the peer-reviewed studies underlying its projections. If those studies hold up to scrutiny — and Nature-published dose-response research generally does — then the Carbon Impacts Tracer becomes a durable piece of infrastructure for climate accountability. If they don't, it becomes an advocacy prop. The science page on the tool's website lays out the methodology for inspection, which is the right move.
