I want to put reliable data about volcanic activity and its climatic effects in front of the public in a way that is both engaging and easy to interrogate. The project centres on an interactive online tool that visualises how major eruptions—Tambora, Krakatoa, Pinatubo and others—altered temperature, precipitation and atmospheric composition across different regions and centuries. By highlighting these natural events I aim to broaden the climate-change conversation beyond carbon dioxide alone and ground it in the full sweep of historical climate patterns. Core features • Web-based interactive timeline that lets users jump to any significant eruption and instantly see associated shifts in temperature anomalies, aerosol optical depth, and related metrics. • Dynamic maps and charts fed by open, peer-reviewed datasets (e.g., ice-core records, NASA GISS, Crowley SO₂ indices) with tooltips linking back to the original sources for transparency. • Download and share options so educators, journalists and researchers can export customised views or embed specific visualisations in their own work. Technical notes The stack is flexible as long as performance remains smooth in modern browsers. D3.js, Plotly, or comparable libraries coupled with a lightweight back-end (Python/Flask or Node) would all work; I am open to alternatives if you have a better idea. Clean, well-commented code and clear documentation are non-negotiable. Acceptance criteria • Full-functioning web app hosted on a test server, responsive on desktop and mobile. • Data sources cited and linked within the interface. • User can filter by eruption size (VEI), time range, or region and see results update in under two seconds. • Delivery of source code, data-processing scripts, and a short read-me explaining deployment steps. If you are passionate about climate science storytelling and have a knack for interactive visualisation, this project should be both challenging and rewarding. Let's give people a fresh lens on our planet’s past to help inform smarter decisions about its future.