First, a gratuitous picture of Iris on the drive between Christchurch and Akaroa.

Now let's talk about the difference in attitude towards energy between the US and NZ.
Look at this cool clothes dryer that came with our first host family's new "spec" home. The smaller portion ratchets up for a small amount of laundry. The lower portion ratchets up for a big wash day. This family doesn't even own an electric (or natural gas) clothes dryer. (If it rains for an extended period of time, the hostess uses a small clothes rack in the garage.)

What builder in the US would put a clothesline, much less a cool and space-saving one such as this, in a spec (speculative) home, built with no particular buyer identified yet? In the US, builders of spec homes put in tons of energy-wasting appliances, vaulted ceilings and install marble or granite (or some other labor-intensive to maintain) finishes throughout.
We stayed with two families and went to a party at a third. There was not a single vaulted ceiling in sight, even in the two newer homes. Hot air rises. With the ubiquitous American great-room with vaulted ceilings, you have to heat a lot of air to sustain a comfortable temperature at people level during the winter.
Homes were built for easy maintenance. New Zealand has a labor shortage. (An island nation, they don't have desperately poor neighbors who will do their dirty work for them for next to nothing.)
Everyone saved their kitchen scraps for composting. The hostess of the townhouse pictured above had a very compact compost system that originated in Japan. (If I could get it in the US, I could fit them in my side yard and still have room to walk by. I gotta figure out a way to get a pair of those.)
Many people grew vegetable gardens. Even in small yards, people would tuck some edible lettuces or a few tomato plants among the flowers. They used their home-made compost. They talked about the thin topsoil and high winds in New Zealand and the need to constantly amend and improve their soil. They talked about soil in terms of stewardship of a precious resource. We hose our soil down the storm drains in the city and I am going to leave ranting about American farm practices to others.
New Zealanders import every drop of oil that they use. You won't find many gas guzzling cars on NZ roads. (Though you will see many diesel-powered camper vans like the one we rented; they are surprisingly economical with fuel.) Lacking a domestic car industry, they had no problem recently banning the importation of large trucks and SUVs.
About 2/3 of their electricity comes from hydroelectric projects. Another fraction comes from geothermal sources. Electricity is enormously expensive to store, and impossible to store on a large scale. Thus, electricity costs vary greatly by time of day. Homeowners are highly incentivized to use electricity after peak demand hours. One host family heated water only after 9 pm. If they use up the 240 liters they heat up each night before the following night, too bad. They plan their daily activities so that they don't run out of hot water.
Imagine that. Planning your daily activities in advance. Prioritizing energy and water use. Doing your own dirty work.
Doesn't the first picture of Iris remind you of the ads that energy companies in the US run? She already lost her new glasses. They were adorable, as you can see.