How big is the upcoming march going to be? The Green Party of Philadelphia has a number of buses going from several points in town. Normally, buses leaving from the city for out-of-town marches and rallies leave from just one central point. Now the Greens are confident they can fill buses from all over. I was on a conference call last month where we discussed people using the floors of churches to put their sleeping bags on. Even back then, all such space was already booked. 350.org has a section on the march which is our go-to, central point of information. Why is the organization named 350? In order for human beings to be safe, the CO2 in our atmosphere should be at or below 350 parts per million (pre-industrial civilization had around 275 ppm) and we're now above 400 ppm.
But this issue has been around for awhile. Why is this march now gathering so much enthusiasm and attention? My own thought is that global warming has previously had a direct, observable effect on far-off places, Pacific islands, the Arctic and the Antarctic, etc. Now, Venice, Italy and Norfolk, VA are affected. Both land masses are heavy and weighted down by cities and are thus sinking very slowly into the sea, but that doesn't account for all of the gains that the sea has made on both cities. In both cases, sea levels from global warming are clearly having an effect. Parts of Norfolk, the main US Navy base, are regularly flooding with salt water, so the Navy is very intimately aware of the effect that global warming is having as they can see the sea rising right in their front yard.
There are many other effects that global warming is having, “Glaciers everywhere are melting and disappearing fast, threatening the primary source of clean water for millions of people. Mosquitoes, who like a warmer world, are spreading into lots of new places, and bringing malaria and dengue fever with them. Drought is becoming much more common, making food harder to grow in many places.”
Is global warming implicated in violent world events like the Arab Spring? Evidence indicates that warming is a “stressor.” It's not a cause of violence and revolution, but it adds to the volatile mix that causes social upheavals.