In my absence, please do the following:
Open the 2nd e-Journal on Water (Download it if you haven't done so)
View this video on the Marina Barrage.
Refer to these websites to find out more about the 4 National Taps of Singapore
4 National Taps from PUB (Navigate using the left-hand sidebar)
From your understanding you've gained from the websites, describe 2 advantages and disadvantages for each of the Tap in the e-Journal.