title	description	keywords	date	modified
Air Pollution Data	Air pollution datasets and other sources of related data.	air pollution data	2018-07-17	2020-03-20

Policy

Country or sub-region level monitor airpollution
CO2 "price" in European ETS http://datahub.io/core/eu-emissions-trading-system (European Union Emissions Trading System (EU ETS) data from EUTL)

State of the World

On a global level there are open data on airpollution around the globe https://www.epa.gov/outdoor-air-quality-data/download-daily-data with parameters of datasets: type of pollutants, year, geographical areas
On a loval level there are open data on the level of each country (see below for some countries)

Parameters

World https://www.epa.gov/outdoor-air-quality-data/download-daily-data
France https://www.airparif.asso.fr/en/#
UK https://www.gov.uk/government/collections/air-quality-and-emissions-statistics