The core strands of my involvement in public life are a belief in the need to strive wherever possible for equality of treatment and opportunity, to ensure all people have the means to a decent livelihood.

It is now well understood that humans ultimately depend on the health of the planet for their wellbeing.

That was the crossover line for us, to be able to play that many shows, sell them out real quick and have that tribe queue up outside and still be a mystery to everybody else.

There are a range of associated impacts related to increasing temperatures which affect both evaporation rates and river systems, which are already over stressed, and these will hit farming communities and the health of crop lands.

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.