This interactive D3.js visualization displays PM2.5 air pollution levels in India, separated by year. The SVG chart animates a line and area graph of pollutant concentrations, with color-coded bands indicating air quality categories from "Good" to "Hazardous." Users select years via clickable buttons, triggering a transition that redraws the data. The tooltip reveals exact values and health status on hover, with data loaded from a CSV file hosted on GitHub Gist.