A study found that 20% of Hong Kong’s population wants to leave the country due to air pollution bringing a big question mark over the Hong Kong’s financial future. Even higher percentage acknowledged the fact their health was affected by the Pollution.

The findings equate to 1.4 million residents thinking about moving away, including 500,000 who are “seriously considering or already planning to move,” according to the survey by the think tank Civic Exchange.

Those most seriously thinking about fleeing the city include top earners and highly educated workers, raising questions over the southern Chinese city’s ability to attract and retain top talent, the report’s authors found.

“People from all sectors of society know that air pollution is making them sick,” said Michael DeGolyer, a political science professor at Hong Kong Baptist University.

“Many are concerned to the point they are considering leaving Hong Kong, including local professionals.”