Arc de Triomphe in Paris, France. [File photo]

The report shows that China's national average of PM10 index was 82.436 micrograms per cubic meter, which dragged China down in the ranking list to 166th spot. The report suggests that China has to transform its economic development mode, raise its eco-protection awareness across the nation, and most importantly, to take actions.

"It is hoped that the evaluation mode of Beautiful Countries could help countries around the world to design a more development path. Adjusted, the index could also be applied in provincial evaluations," said Li.

The Beautiful Country study project was carried out by experts from China's State Forestry Administration, Tsinghua University and Beijing Forestry University. The project was initiated to evaluate the development mode of countries in the world.

The top ten Beautiful countries are America, Germany, France, Russia, Britain, Canada, Spain, Italy, Australia and China.