Bruce Bell’s latest response (Here you go then, letters April 11), by focusing on past hurricanes and floods, is another subterfuge to defend his denial of global warming. Again he refuses to acknowledge the science and the overwhelming evidence in support.
While agreeing that these past weather events took place, it is puzzling to see how this has any relevance to today’s climate change. What is significant is that sea temperatures continue to rise there is clear evidence that the frequency and intensity of tropical cyclones and floods are on the increase.
As I have stated before, without greenhouse gases the Earth’s surface would be completely frozen over, some 33 degrees Celsius colder than at present. Water vapour accounts for most of our greenhouse gases.
Our knowledge of CO2 as a greenhouse gas goes back more than 150 years, and adding more into the atmosphere — we are already approaching a 50 per cent increase above the pre-industrial level — will trap more heat from escaping from the Earth’s surface. More than half of the one degree Celsius rise in global temperatures since pre-industrial times has occurred in the past 40 years, at a time when we should have seen a small decrease owing to a measured slight drop in the sun’s total output.
Bruce Bell’s persistent denial of the science and supporting evidence suggests either he has a stake in the fossil fuel industry, or he is entrenched in some form of fundamental religious dogma to rebuff information that would be upsetting or anxiety-provoking to allow into one’s belief system.