Nearly 200 countries launched a fresh round of UN climate talks in Doha, facing urgent appeals to scale up the fight against greenhouse gas emissions.

IT is apparent that Dr Colmán Etchingham (Letters, March 25) has not bothered to familiarise himself with either the history of the formation of the Intergovernmental Panel on Climate Change (IPCC) or with the detail of its work and method of operation.

The level of chlorine-based chemicals in the atmosphere is falling and the hole in the ozone layer over Antarctica should close within 50 years, scientists in Australia and New Zealand have said.