Talk, as they say, is cheap. Actions are far more expensive. So what really are the prospects of the nations of the world solving the problem of global warming? Even getting agreement on a form of words declaring the best of intentions is proving difficult enough.
Political leaders have been described as saluting the notion of controlling climate change but, as with Chinese President Hu Jintao and US President Barack Obama yesterday, there has been much emphasis on the difficulty of actually reaching an overall deal in Copenhagen in December.
And any agreement that is made looks very much as if the difficult bits of actually curbing carbon dioxide emissions in a meaningful fashion will be promised by this lot of leaders but left to their successors in 10 or 20 years to actually carry out.