However, I am not in agreement with Graham Parton (October 15) that The Border Mail should cease publishing letters that disagree with this consensus. It's a sign of respect that we should at least listen to the contrary voice, however far-fetched they may seem. To do otherwise would be to feed their fear of some worldwide conspiracy against them. Then no minds will be changed. Sadly, our society is fast becoming a shouting match between groups of people holding firmly entrenched positions. Many such negative letters using derogatory language are counter-productive to their own cause.

For example, using such sweeping inflammatory terms such as 'virtue signaling' and 'climate hysteria' just covers up a failure to understand the real issues involved. For me, I automatically turn off and their argument becomes null and void.

This time a reply from George Krooglik (The Border Mail, October 15) denying climate change and presenting us with "500 of the world's highly qualified climate and related fields scientists..." who made a submission to the United Nations.

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He doesn't name any but one could be very sceptical because "while some outlets described the co-signers as experts in climate science, most are not .... a significant portion of the co-signers are either engineers or professionals in non-technical fields. Only 10 identified themselves as climate scientists."

But George rounded off with the fairly common furphy that since (the benign gas) carbon dioxide is necessary for plant growth, a lot more can't be a problem. Well I am sure that George would agree that oxygen is vital to life but it too can be a problem if there is too much. Look up bronchopulmonary dysplasia and retinopathy of prematurity, medical conditions caused by too much of that essential gas oxygen. It's time to listen to the huge majority of qualified scientists who are daily giving us more evidence of anthropogenic induced climate change.

So Bill Whitham thinks Greta Thunberg, Sweden's teenage climate activist, has been brainwashed along with thousands of young people around the world ('It's about time', The Border Mail, October 10).

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Greta is the forerunner of these people who have every reason to be concerned. Everywhere temperatures are reaching levels not seen before, while the current drought shows no sign of ending. Ground water is becoming scarce with councils having to truck in supplies for domestic use. Typhoons and other storm events are becoming more severe. Greta has rallied people like herself. She knows time is running out, and it will be her generation and the next who will suffer if those in government don't take drastic action now.