Energy
Solar generation is tipped to play an increasingly important part in meeting New Zealand's future electricity needs.
Pig power
Right now, millions of cubic metres of biogas either gets flared off, or wafts downwind to annoy the neighbours. But that gas could be generating electricity, powering vehicles and balancing our trade deficit at the same time, finds Dave Hansford.
The winds of change
Much of our electricity now comes from rain and wind, but, asks Greta Shirley, can they keep the lights on in a changing climate?