This scatterplot visualizes daily PM10 emissions in Sacile, Italy, throughout 2020, with each circle representing a day’s measured average. Points are colored red when values meet or exceed the daily limit of 50, marked by a dashed red line, while gray indicates lower readings. The chart uses D3 v7 with SVG rendering, including a time-scaled x-axis, linear y-axis, and a hover tooltip that displays the exact date and value. Data is loaded asynchronously from a CSV file via `d3.csv`, and axes are generated using `d3.axisBottom` and `d3.axisLeft`.