I really want to help?

Seeing as you are in Australia, you might already know about the present and future threats to coral reefs around the globe, particularly the Great Barrier Reef in the north west part of your country. Ocean accidification is a growing threat to marine ecosystems and reducing CO2 levels is the best way to protect these habitats. Planting trees will help reduce atmospheric CO2 levels. What about beach clean up? I am glad to hear that you care about these things.