Live Earth

On saturday I was watching several fragments from the Live Earth concert - an enormous show happening in major cities at all continents and trying to raise the awareness and attention paid to the changes of global climate. Actually I am wondering about the sense of such events, I am not sure whether the impact can really be so strong that it can balance the usage of energy necessary for such multi-concert. However there was one moment, which has really amazed me. The first band which I saw playing was dressed in black T-shirts with white letters saying "SAY NO TO NUCLEAR ENERGY". Quite an interesting way, how to fight the global warming, isn't it?