No droughts are linked to CO2 by any evidnece stronger than imagination.
Droughts are linked to rising temperatures. By all means go and check that.
The IIPC position here is very conservative in not linking drought patterns to climate change directly, but I have to say that I don't think many people in countries like Spain, Australia or India would agree.
Drought is NOT particularly common New Zealand. Certainly in regions like Marlborough and Canterbury they occur quite frequently, but this years drought, which cause NZ$2 billion worth of damage, effected areas where drought is quite unusual, such as Otago and Waikato.
In the history of the earth, drought has never been in all those places at the same time?
That is simply childish and not at all what I said - what I said was that although the earth has always had severe droughts, it is unusual that countries as diverse as India, Spain, NZ and the US would all experience historically severe droughts within a single 12 month period.