The Guardian, 22 December 2014:
It is worth recalling that world leaders all agreed to prevent dangerous anthropogenic climate change as long ago as 1992 at the Earth summit in Rio (Poorer countries demand more from rich on climate change, 13 December). Anything agreed in Paris next year will not be implemented until 2020 at the earliest, and will probably be voluntary. There will be no independent monitoring, so countries can continue to emit carbon while their leaders pay lip service to the need to tackle global warming. Since 1992, annual emissions of carbon dioxide have increased by 60% globally, and the rate is accelerating.
Dr Robin Russell-Jones