I really don't want to take any of the importance away from the crucial talks at COP17, but global warming is a natural occurrence that millions of years ago turned our planet from "snowball earth" to the great life-supporting system we enjoy today.

Our sun has been losing its gravity strength as it fuses a million tons a second of lighter elements into heavier elements, giving off light energy that gives life.

But just as it once gave us life, it will surely take it away in the next 2billion to 4billion years.

Our sun is growing into a red giant star at the rate of 1million tons a second of mass lost. This mean it is inflating like a balloon as the gravity decreases, and our sun gets a little closer all the time.

That is no excuse for us to speed and worsen the natural warming with greenhouse gases.

Our civilis ation needs to filter our atmosphere with clean, energy-powered filters .

We should not turn up the heat with greenhouse gasses. That will only shorten human civilisations.