I was surprised to see a letter denying climate change in your normally sober pages (BSj 01/07).

Patrick McKay鈥檚 views go against the vast majority of scientific opinion.

He refers to the Oregon Petition, a widely discredited petition promoted by a US pressure group in 2001. There is no evidence that most of the signatories were professional scientists, never mind climate scientists. But in any case, the perception of climate issues in the USA has shifted radically since then.

In June 2005 the US Academy of Sciences signed a joint declaration with ten other national academies of science, stating that 鈥渢here is now strong evidence that significant global warming is occurring鈥 It is likely that most of the warming in recent decades can be attributed to human activities鈥, and that the science was now 鈥渟ufficiently clear to justify nations taking prompt action鈥.

Mr McKay鈥檚 dismissal of modelling as an occult practice is somewhat ironic, given that building services engineers increasingly rely on modelling techniques to predict the performance of safety and other systems.

A host of reputable bodies in the UK are involved in assessing climate change, including the Tyndall Centre for Climate Change Research, the UK Climate Impacts Programme and Sir Nicholas Stern鈥檚 recent commission for the Treasury. All agree that we need to reduce our emissions by at least 60% by 2050 and that the next ten years are crucial.

黑洞社区 services engineers have a vital role to play in this task, since emissions from buildings are a major element of the UK carbon budget. They may wish to consult other more reliable sources of information such as DEFRA鈥檚 Climate Challenge website: www.climatechallenge.gov.uk .

Philip Gray, environmental performance advisor, property services, Northants County Council