Environmental protection in Singapore

Singapore doesn't have much in terms of nature, its protection or awareness of these.
There are a very few protected spots of (more or less) undisturbed forest and swamp within the concrete jungle that forms the city state - e.g. Bukit Timah and Sungei Buloh Nature Reserves, which are worth visiting if you haven't been to similar places in other countries.
No waste separation and very limited recycling activities take place, since all refuse is used to reclaim much needed land from the surrounding sea (at great cost to marine life, already disturbed by dense ship traffic).
The air, however, is mostly clean, due to the lack of heavy industry and the limitations on road traffic (induced by space concerns, not environment) - except during the almost yearly forest fire season in neighbouring Indonesia, which often send enough smoke to Singapore to limit visibilty to a few hundred meters or less.