Here's where Singapore falls short as a global city

It has to work on sustainability and liveability.

While it enjoys its overall global city ranking at second place next to London, Singapore still has to work on its flailing sustainability.

According to the latest 2016 Cities of Opportunity report by the PricewaterhouseCoopers LLP (PwC), the city-state has managed to climb to the second rank after finishing third in the previous study, recording three first position finish in three indicators including technology readiness, transportation & infrastructure, and ease of doing business.

However, the report noted that Singapore has fallen four places since 2014 in sustainability and the natural environment, finishing at 20th position this year behind its neighbors Seoul and Hong Kong.

"While the city’s harsh climate helps to explain its score in thermal comfort it is more difficult to account for its middling results in air pollution and recycled waste," the report noted.

Moreover, the Lion City remained in the middle of the road for demographics and liveability as it landed at 17th place.

"Entertainment and attractions, and the YouthfulCities index both turn out bottom 10 results. The city does have 2 top ten performances in relocation attractiveness and new measure, senior well being, but is middle of the pack or below in the other 5 variables," the report explained.

The City of Opportunity report analyzes the development of 30 global cities including Asian cities: Beijing, Dubai, Hong Kong, Jakarta, Kuala Lumpur, Seoul, Shanghai, Singapore, Tokyo, and Mumbai.