ATMOSPHERIC CO2 has risen above 400 parts per million and is accelerating. The Arctic Ocean may well be ice-free this summer; methane gas is being released from the melting permafrost into the atmosphere and ocean acidification is intensifying. Sea levels are now rising far faster than predicted only a couple of years ago.
All these changes are irreversible. They make maintaining the global temperature rise below 2C an illusory goal. The unavoidable outcome of this nightmare scenario is a rapidly deteriorating climatic situation.
The effects will be economic as well as ecological and are already evident. We therefore request that all parties specifically set down clearly what policies they propose on climate change.
PROFESSOR PETER WADHAMS, DR ROBIN SCOTT, PAUL INGRAM and EIGHT OTHERS