Good Luck
New member
First of all, I think you need to revisit the definition of "mass extinctions". There are a few examples we know of from fossil records, and nothing we see today even comes close. Mass extinctions are when a significant percentage of total species die off in a relatively short time. Of the major 5 mass extinction events, the smallest one resulted in 50% of species dying out.I don't think it's a "just in case" situation. The debate will rage about AGW, which to me is unfortunate, because even if we are 100% behind AGW, there really isn't a way to stop it at this point (and certainly not with weak measures like token improvements in car performance).
There is no doubt whatsoever that man's activity is contributing to the mass extinctions going on, which will have extremely far-reaching effects. I'm not technically a Gaiaist, but I supposed I think like one: if we treat the planet only like it's a resource for us to use as we please, we're basically a parasite, and eventually the planet will find a way to eliminate that parasite.
"Unsustainable" is a popular buzzword, but it applies. The way we live know is completely unsustainable, and not even in the long term. I'm not optimistic that we'd make any of the changes that need to be made - when was the last time a politician brought up population control in a speech? - but if everyone really took a look at what is going on, I think there would be some agreement that a revolution of sorts is needed.
There are over 2 million known species, and an estimated 200 million total. To approach even 1% extinctions the rate would have to increase by at least 3 if not 4 orders of magnitude. People calling current events "mass extinctions" are using the term for its emotional impact rather than by its scientific meaning. Certainly humans are causing large numbers of species to go extinct. That is not a good thing, and we do need to gain more control over what our activities do to the environment. But neither is it a sign of coming doomsday. There are plenty of very good reasons for taking what steps we can to "clean up our act" so to speak without the need for extremist fear mongering that we are responsible for the geophysical evolution of our planet.
The Earth has gone through many, many changes over the millenia. It has gone through changes far more extreme than the ones currently being observed and forecast (for what our forecasts are worth) without the need for human activity to explain. The idea that humans are needed to explain current events when compared to past events is just short of ludicrous. We don't even know for sure what caused past events, how can we turn around and then claim this time it's different? Different from what? Well, we don't KNOW what it's different from, just humans are involved and therefore it must be humans' fault. It's the tendency of environmental extremism making mankind into the bad guy taken to global political levels.
We DO know that current trends indicate some significant changes taking place in the next few hundred years or so. We can spend our limited resources to prepare ourselves for a (somewhat) different Earth, or we can spend our efforts vainly (with two meanings here) trying to decrease an influence that is questionable at best.