Hello Philip,
I think everyone should consider studying sustainability. Then we would have less people just being greedy and selfish (I hope at least) when they come straight out of university.
Are you based in the UK?
If so, I would take a look at the following universities of Nottingham, Cambridge, Bath and LSE.
As far as I know these are the ones with the best reputation. But there are maybe more out there.
Hope this helps.
Fabian