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The audience log makes interesting reading on some days - but this morning it recorded that one of our listeners thought we covered global warming too often on the programme.

To those who missed Wednesday's show, the report that provoked this comment was Paul Moss's walkabout (listen here) at the new exhibition, "", which is intended to help raise awareness. I asked Paul to go find out if it works.

I have to hold my hand up though - we do cover climate change reasonably frequently on the programme - for two reasons. Firstly, it is a big story - scientists tell us this, politicians tell us this and - here's the clincher - our listeners tell us this. Whenever we cover environmental stories we are guaranteed to get a large and lively response to our online listeners debate - which bears out the old adage - you can please some of the people some of the time, but...