I agree Trigger.
I think we have, as a species, this perpetual superiority complex, that we are SOOO significant, the sun revolves around US, or we can alter the climate of the earth... as if the Sun, the life source of our entire solar system, heating and cooling with various sunspot activity, has no such effect. The Sun, which controls our seasons according to earth's tilt towards it, cannot possibly have as great of an effect upon our climate as people.
It just so happens that sunspot activity increasing and decreasing has an exact correlation with increasing and decreasing global temperatures. we are NOT in the warmest period in history, or even human history, as the Middle Ages were warmer. also, we actually havent been warming since 1998, as we are now in a cooling trend, as sunspot activity has decreased.
we are also not the only planet in our solar system experiencing climate change. Pluto (although no longer classified as a planet), Jupiter, Neptune, etc, all experiencing climatic changes, Mars' ice caps were melting in the same period we were experiencing warming.
How does us driving SUV's cause climate change on Mars? Al Gore forgot to explain that one to me. OH! and, just an interesting side note... recent ice core samples of CO2 levels have shows that there IS, in fact, a correlation between increased CO2 in the atmosphere, and temperature variations. Remember Al Gore had that graph that showed how they lined up perfectly?
Well.... it turns out, that the conclusions of this study showed that the relationship is not what we think. To believe anthropogenic (human caused) climate change, we have the assumption that we emit CO2, and then temperature increases with the more we emit, following along the same lines as the CO2 - it increases, temp increases. However, the study showed the opposite. That temperature in global climate would increase and decrease, and that CO2 emissions would FOLLOW the changes in temperature. and not only that... but they would follow by nearly 800 years of lag time behind the temperature increases.
So... what will I be doing earth hour? Maybe doing some research on climate science and real environmental issues, and not engage in a symbolic display of supporting the effort to stop the world from spinning.