What are the 4 national taps of Singapore?

Related questions

1. How stable is the Singapore dollar?
2. How much cash should I carry to Singapore?
3. What's the best currency to take to Singapore?
4. Does Singapore have water shortage?
5. What is Singapore currency backed by?
6. Is it safe to go to Batam?
7. Is 200 pounds a lot of money?
8. Why is SGD so strong?
9. What is PPP per capita?
10. Is Singapore self sufficient in water?

Tags

1. #catchment
2. #sources
3. #singapore
4. #imported
5. #known
6. #grade
7. #robust
8. #desalinated
9. #water
10. #diversified
11. #supply
12. #newater
13. #local
14. #national
15. #sustainable
16. #reclaimed
17. #built