Who appears to be the biggest malefactor? The sun or human beings?
That’s very difficult to say. The sun absolutely has an influence, but now the influence of humans is noticeable for the first time in the history of our planet. At this point, it’s not that bad, but we need to impose conditions like Kyoto. It’s true that the sun is responsable for the warming-up of the earth, something that’s happened before, but now humans also have an influence and that can turn out being dangerous.