Here in New Zealand, we’re lucky to generate 80% of our electricity from renewable sources like hydro, wind, solar and geothermal. Our main electricity source is hydro power, which is relatively easy to switch on and off at will and provides a stable baseline source (at least when the lakes are full). Wind power is also a significant source of renewable energy, but the amount of electricity generated varies greatly depending on current weather conditions and it can’t be stored. On the other hand, the 20% of electricity from non-renewable sources is primarily generated by burning fossil fuels.
As well as having a high overall proportion of renewable energy, some electricity “gentailers” (generator–retailers) in New Zealand produce electricity using 100% renewable energy sources. I used to think I could do my bit to reduce carbon emissions by signing up for power from one of these 100% renewable gentailers. But it turns out all the electricity being generated at a given point in time is fed into the grid and distributed throughout the country to where it’s needed, so the mix of electricity sources is the same for everyone, regardless of who your power company is. Continue reading