- animal disease (e.g. mad cow disease). government might order to kill them to spread its growth.
- crop failure, crop prices. cows depend on food, if a crop failure/desease happens, crop prices will go up, so will be their food, as probably their poo as well.
Beside that, bio-energy does not count the CO needed for stuffing the animal with food, so you might to count all the chemicals, fuel and machinery a farmer will use to grow that animal into account.
Given those unreliableness, you would have to have a long time backup energy for that (like it would take time to get new, uninfected animals in case of an disease).
That given in account I would'nt go for poo-energy and stay with an alternative mix of green energy.
Now you will no longer have to clear Mobile Safari's history just to hide a single entry, which rendered the URL auto-completion useless!
Are they kidding? Deleting browser and URL history might be as leaving less traces on that device, BUT for me, browsing anonymously means something like TOR...
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