I'm going to mentally take a tire iron to the next raving moron who says there is no global climate change going on. As annoying as some greensters can be about their self-righteousness concerning this issue, the fact that it IS going on is something I can see and feel with my own senses. How much of it humanity caused is something perhaps we'll never know, but I figure by never having driven a car in my life after deciding my spaced-out nature would make doing so too dangerous for me and for others, I've done my part in advance of knowledge and belief.
What tells me it's happening is the weather in San Francisco. A place long known for its fog, the fog is pretty much gone except for a couple months a year and only on the southwest end of the City most of the time. Downtown, there IS no fog anymore. There once was fog just about every morning of the year when I first came here in 1988 and I've watched it slowly vanish over the past 23 years. That is a really short time for a climactic pattern affecting a whole metropolitan area to just up and vanish.
The temperatures here are also far hotter for far longer than I remember them. It used to be that San Francisco had skewed seasons. "Spring" started in June and went on until August or so, and "summer" was when autumn was supposed to be, with the really hot days being in September and October. "Winter" slowly edged in from a short and undramatic autumnal shift around the holiday season but it didn't get cold or windy-rainy until January and February.
This has now all shifted around and doesn't seem to have settled at all. We just don't have anything resembling true seasons any more. Really hot days happen whenever they damned please and we barely get enough rain to matter. In fact, there are predictions that if this doesn't change soon, we may have water wars with the East Bay and Central Valley since Hetch Hetchy (what a silly name that is for a water reservoir) has been called "a pond" by drought-panicked forward-thinking persons.
The only positive thing about all this is that since the climate change is so shifty it still might shift again and before we know it we may end up with more rain than we know what to do with. I am not a meteorologist; there's a lot I don't know and probably should find out since getting me to leave San Fran would be like pulling teeth. I'm so accustomed to the air here which is still, in my unhumble regional smugness San Franciscans are famous for having, the best I've breathed anywhere, owing to the unblocked Pacific "down-drafts". Gods hope it stays that way...