Install Rooftop Solar...
The Climate Council recently published '8 New Year's Resolutions on Climate Change', in which Resolution # 3 was 'Install rooftop solar, or switch to green energy'
"Two million (and counting) Australians are now harnessing the power of the sun to reduce their greenhouse gas pollution and take control of their power bills by installing rooftop solar. And when paired with battery storage, rooftop solar can deliver clean, reliable, renewable power 24/7".
If you are considering installing rooftop solar, you need to do your homework, and might like to begin with chapter 4 of the Climate Council's climate action toolkit. You may also find Solar 101 - A Beginner's Guide helpful. Purchasing from a reputable supplier is important - word of mouth can be helpful as can information such the suggestions as to good installers provided in the Solar 101 video.
...or purchase green energy?
"Alternatively, if you’re not in a position to purchase solar panels, you could consider making the switch to a clean energy provider, who will purchase renewable energy on your behalf. This is also a great way to bring down greenhouse gas pollution and invest in renewable energy."
There are well established and newly emerging green electricity providers. Some offers relate more directly to the purchase of renewable energy than others which have a greater or lesser component involving carbon offsets. It is important to check out each provider's offer to ensure they are a 'good fit' with the values underpinning your pursuit of green energy options.
The Climate Council recommends check out the Green Electricity Guide for help picking a provider.