DR Rodger (Echo, April 16) refers to the “evidence-based information provided by the windfarm developer”.

That developer did not provide any evidence on climate change, no evidence how Navitus Bay would affect climate change.

The developer provided, as “evidence”, noise impact calculations. These were challenged by acousticians Dr Andrew Langley and Dr John Yelland.

The developer revised his calculations recognising that the noise levels onshore would be many times higher than his original “evidence”.

The most significant information on CO2 was presented by Dr Bratby, which showed that any windfarm requires a conventional power station, running as back-up, to cover the wild variations in output.

The back-up is forced to run inefficiently, producing more CO2 than when allowed to run at optimum.

In the worst case this combination produces more CO2 than with no windfarm.

JOHN SEARLE Irving Road, Bournemouth