{"version":"1.0","type":"rich","title":"PM2.5 Air Pollution Trend","description":"This visualization presents PM2.5 air pollution trends from 2010 to 2017 for 240 countries, with each country’s annual mean exposure drawn as a thin, semi-transparent line over time, revealing a sharp global dip in 2014 followed by a rebound in 2015. Built with the vega-lite-api and D3.js, it loads CSV data from a GitHub Gist via `d3.csv`, then melts the dataset into a tidy format before rendering line marks with tooltips. The code customizes axis styles, hides the domain, and uses a dark color scheme to improve readability, with the view auto-sizing to the browser window.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/b2a7232644da4eb18c2fb6ed690ef5b9?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}