This research develops improved methods for exploring and visualising global country-level data over time. By identifying patterns, trends, unusual observations and differences between countries, and addressing missing data through the R package ‘wdiexplorer’, the work aims to support researchers and policymakers in making better informed, data-based decisions across multiple sectors.

This research transforms human urine into sustainable fertilizer using solar-powered systems that recover nutrients like nitrogen, phosphorus, and potassium. By turning toilets into decentralized fertilizer factories, the approach improves sanitation, reduces reliance on energy-intensive production, and provides affordable fertilizers to underserved farmers, supporting both environmental sustainability and economic development.

This research evaluates whether reflective cool roofs can reduce indoor temperatures and improve health in climate-vulnerable communities. A global randomised controlled trial across four countries will assess impacts on physical and mental health, productivity, and hospitalisations, providing evidence on whether this affordable intervention is cost-effective and capable of saving lives.

Electricity access doesn’t always translate into real development benefits. In Timor-Leste, “100% access” still leaves hospitals dark at night. A review of global evidence shows that over a third of electrification outcomes are neutral or negative. This research explores barriers that limit electricity’s impact to inform better policy and community support.