The Air Quality Index is based on measurement of ground-level ozone, particle pollution (PM2.5 and PM10), carbon monoxide, sulfur dioxide, nitrogen dioxide. Data provided by World Air Quality Index Project (waqi.info and aqicn.org)

Weather app for traveling: Find out the weather on your travels: Should you take shorts? Pullover? Warm jacket? Umbrella or raincoat? Sun cream? What will be the maximum temperature? And the minimum? How many rainy days?