Coral reefs, the rain forest of the ocean, are home for one-third of the species of the sea. Coral reefs are under stress for several reasons, including warming of the ocean, but especially because of ocean acidification, a direct effect of added carbon dioxide. Ocean life dependent on carbonate shells and skeletons is threatened by dissolution as the ocean becomes more acid.

There is still time to act and avoid a worsening climate but we are wasting precious time.

As you get more global warming, you should see an increase in the extremes of the hydrological cycle - droughts and floods and heavy precipitation.

Until the public demands otherwise, the policy makers will continue to serve their financiers.

The fact is fossil fuel carbon will stay in the surface climate system for millennia.

The evidence for human-made climate change is overwhelming.

The last time the world was three degrees warmer than today-which is what we expect later this century-sea levels were 25m higher. So that is what we can look forward to if we don't act soon.