Just a thought:
If there was a beach that was accessible at Jurong Island, would
anyone swim there?
Not trying to diss anyone here but honestly, I've been there... Its
not my favourite place.
Much effort is put in to treat by products and ensure that waste is
not discharged into the water systems untreated but how do they do
that?
Answer: If they can't reclaim it and recycle it, they burn it. Its
safer than discharging it untreated into the water systems but in
doing so, there's emission. Sure, there are high chimmneys and air
scrubbers and all, but CO2 is still CO2...
Tons of water are used for cooling there... Are we to say that the
warm water discharged has no impact on marine life? I don't know...
I would love to go fishing there just to see for myself, but SAF
soldiers chase me away leh 
Its probably much cleaner than a lot of plants in third world
countries that pays no attention whatsoever to the environment, but
its honestly no shangri la.