Ecosystems at risk will only ask for one ecosystem (I only know one in detail, but coudl go on about the otehr a bit if I needed) and will probably be on biophysical interactions.
For Economic activity, I'd love tourism (any question on it), but the qustion will proabbaly be on a local economic...
I never finished reading The Fifteith Gate, only ever got 2/3 of the way through.
If I could not remember a quote/fact or figure I'd make one up for English or Geography. In Geography one fact I made up and teacher then taught that to the class lol.
BOS essays give me study ideas.