This research tackles concrete’s carbon footprint by replacing Portland cement with locally sourced natural pozzolans. By calcining and testing South Island geomaterials, the work demonstrates a low-cost, carbon-free alternative that maintains strength and durability while reducing emissions and construction costs.

This research tackles nitrous oxide emissions from agricultural soils, a major driver of global warming. By modifying manure application practices—mixing manure into soil or adding biochar—the study enhances soil microbes that consume nitrous oxide, reducing emissions by 60–70% through improved microbial balance and reduced gas escape.