You care environment then you probably want to spend your life in a sustainable house? If you are pretty sure what type of home will suit you then you should start searching the ideas for it. There are plenty of architectures in Australia that can lead you to viable solutions.
The sustainable house design in Melbourne looks like this.
Building an eco-friendly house also depends on your location, what size are you going to choose, and sustainable material would be used for it.
These sustainable ideas can help you to understand the process of building an environment-friendly home.