Forget global warming and think climate change.

There is a heating effect - but that just gets things on the go in the places most susceptible to heating - then there are changes due to, for instance, the melting of ice, the drying out of vegetation - movements of air currents, water currents, droughts, floods, and then hurricanes, tornadoes, cyclones and all things revolving at speed are affected by the alterations.

There are always variations in climate due to changes in the orbit of the Earth, the vigour of the Sun, Humans changing the forest into farmland, even that blasted butterfly - but usually it is a fairly liveable with slow pendulum swing.

What the people who think about these things have been saying is that we might just have kicked the climate pendulum into swinging further, and faster than is safe, and it might just swing back and knock our silly heads off. They might be yelling 'Down!!'and there is no need - or perhaps we'd all be better off closer to the Earth, where we could see the damage being done so much easier.

Anne