POLLUTION and climate change are two different matters.

Ken Livingstone's speech on how cities contribute to climate change further confuses the issue, as does the spectre of Chinese factories.

I do not believe cities, factories or cars contribute to climate change at all, but they certainly contribute to pollution.

The latter is harmful, sometimes fatal, but the former spells the end of the world.

When green-pea smogs descended on us up to the middle of the last century, and indeed killed many of us, they were eventually dealt with by the Clean Air Act, and in less than a generation they disappeared.

This is because the smog was pollution, not a contributor to climate change.

The perpetual haze which hangs over Los Angeles is undoubtedly pollution, not climate change.

There is a cloud layer weather system which ensures what goes up comes down.

This is how we get precipitation, acid rain, smog and pollution.

Unpleasant, but fixable and nothing to do with climate change.

When we expel carbon above the weather system, however, there's nothing to ensure we get it back.

It stays up there as an increasingly thick layer, creating global warming and climate change.

The sole contributor to this ecological disaster is the aviation industry.

Unless we ground all aircraft now, other than for military and emergency purposes, we are deluding ourselves.

Percentage reductions are deceptive, as is the propaganda aircraft are only one of the contributors to climate change.

They are the sole cause, other than when they are taking-off and landing, contributing then only to pollution.

It will take a country like Great Britain to set the example and lead the world with a total ban.

Of course it would mean a radical change to the way we live and work.

But the sacrifice is nothing compared to the alternative.

JOHN DREWRY

Address Supplied