It's not that I think the climate isn't fragile or that it isn't undergoing constant change, I just think that none of our environmental policies address the most powerful factor influencing our planetary ecosystem (hint: the big glowing ball of plasma in the sky), and that trying to "save the planet" is a Sisyphean effort when we're doing nothing to get China (the biggest human polluter, bar none) to clean up even an ounce of their own trash.

A single volcanic eruption can change the Earth's climate more than all the cars on the road today combined, so if you want to be realistic about climate change, we need to be realistic about our sense of environmental scale and the extent of our ability to change/control it.