This scatter plot visualizes air quality by comparing PM2.5 and NO2 AQI values across global cities. Each circle represents a city, with its position determined by the two pollutant levels; hovering highlights a point in orange and a tooltip displays the city and country name. Built with D3.js v7, the visualization renders as an SVG with hardcoded data from the first 100 rows of the v3 source dataset. The chart includes labeled axes and uses standard D3 scales to map the data values to pixel coordinates.