美领馆空气指数

支持主要城市的空气指数实时查询，数据来源于美国大使馆发布的实时空气质量指数
+实时监测中国五大城市的空气质量状态，显示当前的pm2.5指数
+支持多城市定位，并可查看您所关心的城市质量排名
+根据当前空气指数，参照历年的数据，预测未来七天内的空气质量
+按年或月显示所选中城市空气质量的历史数据

科普PM2.5相关知识，并提供预防建议 Support real-time air quality index of major cities query, data from the US Embassy released a real-time air quality index
+ Real-time monitoring of air quality status of the five Chinese cities show the current index pm2.5
+ Support multi-city location, and see that you care about the quality of city rankings
+ According to the current air quality index, reference data over the years, the air quality forecast within the next seven days
+ By year or month urban air quality of the selected historical data

PM2.5 science related knowledge, and provide preventive recommendations