Air quality improved constantly in the past 20 years

For 20 years, the air quality in France improved constantly. For example, the part of nitrogen oxides in the air decreased by 17,3% between 2000 and 2010. Also, chemical products such cleaning agents have their part in air pollution all like traffic and industry. For this reason, changing consumer habits who would rather by biological and less aggressive products are having a part in the improvement of global air quality.