Hopefully, I will not be alone in coming forward to defend the Greens from Martin Crossman’s absurd accusation that the group’s attempts to address the pressing problem of climate change is somehow based on false pretenses (Oxford Mail, February 4).

An incredibly diverse range of international organisations and bodies support the scientific theory that a significant factor in current global warming is contemporary human activity, particular the burning of fossil fuels and the destruction of (among other natural environments) rain forests.

They also believe that while it may prove difficult and expensive, it is still worthwhile attempting to do something about it. They include the Royal Society, the World Health Organisation, NASA, the University of Oxford, the American Association for the Advancement of Science, the Royal Meteorological Society, the British Government and every other government which has signed the Kyoto Protocol, the Church of England, the RSPB, the National Trust, the Network of African Science Academies, the International Council of Academies of Engineering and Technological Sciences, and many others.

The debate over the human role in climate change is long over; the scientific consensus is there.

Please don’t blame the Green Party, its councillors, MP or members for having the courage of their convictions to try and do something about it.

David Boyd Haycock, New High Street, Headington, Oxford