A new study indicates there is a strong link between professional cleaning and the risk of developing asthma, according to study conducted by Imperial College London.

Researchers at the Imperial College London have tracked the occurrence of asthma in a group of nearly 9,500 people born in Britain in 1958.

Not including those that had asthma as children, 9% developed asthma by the age of 42. While one in nine of these cases were attributed to smoking, an even higher number of cases (one in six) were workplace related.

According to the researchers, there are many occupations that are thought to cause asthma.

In this study, 18 occupations were clearly linked with asthma risk, four of which were cleaning jobs and a further three of which were likely to involve exposure to cleaning products.

Commenting on the report, Stephen Ashkin, President of The Ashkin Group, says the report is not news to the professional cleaning industry.

"While the study did not note whether [the cleaning workers in the study] were using Green or traditional cleaning products, we have known for more than two decades that exposure to cleaning chemicals on a regular basis can be a health hazard. This study now confirms this."

To see the complete study, click here.