I haven't chosen to make an issue of faith.

At an everyday level I would reckon myself more than fortunate.

Once you start to look into the guts of climate change you find that just about every scientific institution in the world is conducting research on the issue.

Recently though, our State Governments have discussed instigating a carbon trading scheme - the details are still to be decided - and that's an encouraging sign.

Look, very clearly there are things that need to be done urgently in relation to climate change, and of those the most obvious is to have an enforceable and equitable arrangement delivering deep cuts in emissions into the middle of the century.

Climate change is so big that people who study it.. and many do.. need to speak to it. They must present scientific papers, they must appear in public, they must speak to the media and we must hear their voices. In order to get policy right, policymakers.. governments.. need to make decisions based on sound science.

The Capitol was an occasion where you arrive at a sign in the road that says you have arrived at a place you may not have expected to be, but you know how you got here: Next!