One thing which took me by surprise was many places didn't do recycling. According to my Singaporean friend, recycling is a household choice.

However, I found an amazing building complex which was related to my research project on rainwater usage on sustainable buildings.

The complex is called, "Dawson Project". They are apartment buildings for residents. The buildings employ a rainwater harvesting strategy to irrigate above-ground landscape areas. Rainwater is collected from roofs and deposited in holding tanks to irrigate these area through an automated rip irrigation system. The project has been recognized and awarded its sustainability.

I hope I can spot such a green building system in many countries forward.