Article: Humans have played a major part! A SENIOR MOMENT Continuing the debate on climate change LANCE TUFNELL, of Taylor Hill, an environmental scientist and retired university lecturer, looks at evidence suggesting that for centuries we have been altering the atmosphere of our towns and cities, both outside and indoors.(News)

Byline: LANCE TUFNELL

ATTEMPTS to understand the nature and behaviour of the Earth's atmosphere face two major challenges.

One of these arises because we are dealing with a highly dynamic and complex fluid, of which we have only ever studied a very small part.

The second important challenge arises because of the dominant influence of the sun on our atmosphere, a subject which is far from easy to investigate.

These challenges mean that scientific understanding of our atmosphere, in common with most subjects, is in a state of flux.

Given these uncertainties, we ...

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