https://techcrunch.com/2022/01/24/accuweather-acquires-air-pollution-startup-plume-labs/

Weather forecast company AccuWeather is acquiring French startup Plume Labs — terms of the deal are undisclosed. Originally founded in 2014, Plume Labs has gradually expanded its product offering to offer three different products focused on air pollution data.

First, the startup launched a mobile app for iOS and Android that gives you information about air quality. At first, it was a simple city-level air pollution forecasting app. The company would aggregate data from different sources to predict how pollution would evolve over time.