ferni,
I noticed you've just bought your gtr & congrats to that. But living in Vic & owning a HP car, you'll soon become accustomed to donating $$$ to making this a better place to live. In no particular order..
1. EPA - for your emission test when you receive the quarterly letter.
2. Vic Police - blow off valves, air intake mods, intercooler mods, boost controller mods.
3. Petrol - a portion goes back into making our roads safer & environmentally friendly
4. Brax - Speeding related matters, your funds will be used the same as No. 3
5. City Link - Unregistered vehicle Fines, In case you forget to top up your account. You'll have to donate a hundred dollars to making city link a user & environmentally friendly place to drive.
So, personally I wouldn't bother with planting a couple of trees here & there, Vitorians do more than any other state in donating to preserving & bettering our environment.
Go Brax & Friends!