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I WAS unaware that the government-supported "greening" of universities was well in hand (THES, June 12). Is it likely to lead to a further assault on academic freedom?

I am a life scientist. In biological sciences, I am already intimidated by political correctness, which abhors consideration of difference and, hence, comparative studies that are at the heart of biology.

In environmental sciences, I stress the complexity and uncertainties of some "green" tenets. If universities accept the HE21 policy of Jonathan Porritt el al would teachers who present a variety of views on global warming and toxic chemicals be unwelcome?

Jack Pridham, emeritus professor of biochemistry, Royal Holloway University of London