[@Serpentine88]I was just pulling your leg.
Keep the sexual dimorphism for your species. Making them too different from other races would not do well for relations overall.
And just avoid using pics for the male members if it's so difficult to find a decent one.

Anyways,
[url]http://worldoceanreview.com/en/wor-1/energy/marine-minerals/[/url]
Another interesting read for you.
Albeit polluting our own living place could be a big concern (and interesting plot element).

As for relations and past wars, there's a bit of that discussed here:
[url]http://piratepad.net/GCX0ckPYGq[/url]