We all hope Alan Bourne is right when he says global temperatures peaked in 1998 and climate change was an illusion.

No one can reliably predict the weather next week, next year or next century because there are so many ups and downs. However, we know for certain that the global thermostat setting is steadily increasing.

The natural greenhouse effect is very real and is largely governed by naturally occurring carbon dioxide.

The entire earth would be a frozen snowball without the greenhouse effect.

Carbon dioxide concentrations at Hawaii have increased every year since 1958 due to man-made emissions. Pushing up the global thermostat must be a concern even if the temperatures have not caught up.

GEOFF BROUGHTON
Knollys Close
Abingdon