Personally Comer rather than just going for the water cooling I think you should had powered you PC by natural gas too. You could take one of the 1 inch diameter pipes someone else mentioned and shoved it up the ass of the nearest cow. We do have quite a few in the emerald isle.
Comer if you are a city dweller without access to cows, cats and dogs will do the same job although, you may need to set us as many as twenty of these in parallel as they just dont produce much gas. Feeding them a diet of Beans and cabbage does help considerably!