Regarding P Otway's statement (The Weekend Sun, January 24, page 27) that he disbelieves scientist's statement that there is less CO2 in the atmosphere than there was 10,000 years ago, I would like to know where he gets his information from as I can certainly quote a couple of very well-respected scientists whom would say otherwise.

The first would be Patrick Moore one of the founders of Greenpeace who became disillusioned with the direction the organisation was going in not using the science that was available but becoming too political. He left them and is the chairman of the CO2 Coalition.

In our air today there is 408 parts per million of CO2 compared to the time of the dinosaurs when it was approx 1600 parts per million. Plenty of green forests then!

The second would be 91-year-old Freeman Dyson who is a mathematical physicist and has been dedicated to climate for the last 60 years.

Go to YouTube and search: ‘Conversations that matter' with Stuart McNash.

There are many others if one wishes to search for them.

I try to read as much as I can about these matters on both side of the discussion and get frustrated that there can be such controversy about the topic and would love to have both arguments addressed in a scientific forum of some sort and thrashed out.

At least keep an open mind on the controversy.

W Keen, Pyes Pa.