A good place to tap into Canberra events related to global warming, renewable energy and what you can do is the SEE-Change website at http://www.see-change.org.au/events/
The Australian National University holds many relevent forums at http://www.anu.edu.au/events
You can also find Canberra events at climateXchange: http://canberra.climatexchange.org.au/
The climateXchange Concept
climateXchange, a not-for-profit initiative, gives you access to the latest information and views on climate change and sustainability solutions in your local community
climateXchange was created because there was a mass of information on the internet about climate change and sustainability issues, but it was difficult to sift through it all to find information that was relevant to our specific needs in our local community. There are many local organisations and groups doing great work on these issues in the ACT, but one had to go to lots of different sources to gain an overview of what was happening.
This website brings together in one place all this information and provides a way for you to contribute information and views on these issues.