A new study exposes which popular city breaks from around the world could harm your health . This is according to experts at QR Code Generator who looked at global Google search trends over the past year to determine the results. The team researched the most sought-after holiday spots in the US and Europe and assessed the air quality scores for each destination.

The worse a city's air quality, the higher its score. Therefore, the city breaks with over 100,000 average monthly searches and the highest air quality scores determined the ranking. Paris takes the top spot, with an air quality score of 66.

The French capital received 185,633 average monthly searches for city breaks despite, commuter traffic causing extreme pollution levels in the area. In second place is Chicago, scoring 58 for its air quality. Chicago O'Hare International Airport is one of the busiest in the US, which contributes to the damaging pollution in the city.

However, the city remains attractive to visitors as it garnered 130,968 average monthly searches. Benidorm is third, with an air quality score of 57. The Spanish destination is another city plagued by traffic pollution, but this did not deter tourists who generated 101,775 average monthly searches for Benidorm breaks.

Barcelona is fourth, scoring 56 for its air quality. Traffic in the Spanish city has caused poor air quality, but Barcelona still received 114,431 average monthly searches for city breaks. At number five is Amsterdam, with an air quality.