I watched newsnight here on the BBC earlier and there was an item about global warming.
http://news.bbc.co.uk/1/hi/programmes/n ... 362407.stm
Someone has published a book claiming that global warming is in fact due to a combination of solar radiation, cosmic rays given off from exploding stars and micro particals in our atmosphere being bombarded with ions affecting their ability to produce clouds, or something like that. Less clouds, less heat deflection, warmer planet.
I'm not really sure what to think about this, it's not a new theory, it was first posited decades ago, but it has recently been revived with 'proof' (I wont go into details here, I havn't actually read the book and I might get them wrong!)
But anyway, it got me thinking, and I sortof came to the conclusion that global warming is due to no one, or even small group of factors.
The planet does indeed go through cycles of heat and cold as part of it's natrual cycle - in fact humans burning trees and such over the past few thousand years has staved off the worst of the ice ages - but there is significant evidence that we are if not causing, certainly encouraging climate change.
I saw a news report a couple of years back which might have been slightly scaremongerig, but it showed a picture of the world with the polar ice-caps melted. Sea levels had risen 4 metres and thousands upon thousands of square miles of previously dry land was now under water. However I don't believe this will happen, because as the earth's temperatures rise, the whole balance is thrown and the actual result will be a global cooling - at least in the Northern hemi-sphere for the main.
This is due to the gulf stream being dsrupted preventing it from carrying warm water up around the Atlantic and other such disruptions across the globe.
But what do you think??
Aaand... Discuss!!