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I have been following the global warming debate for some time, and note with interest how well it compares with previous "scares" such as the Ice Age concerns in the 70s. What has struck me about current arguments is that, if you distill the facts out of the widely varying opinions, you are left with two points:

1. There isn't (yet) conclusive evidence of global warming

2. There are other ways in which increased CO2 and other gases can possibly affect our climate

Even John Daly's discussion of global warming notes the possible increase in evaporation and cloudiness which may result. This alternative might nevertheless have notable consequences for our global climate.

We now seem to be in a situation where those who proclaim most loudly about the "warming" are attacking those like Daly who legitimately dispute the point. Are they doing themselves and the world a disservice by ignoring the possibility that a real enhanced Greenhouse Effect may not involve measurable warming at all?

C. Hall, Christchurch