Back in the 60's I often used an inverted bicycle to explain one of my concerns for the ecosystem that sustains life as we know it on our planet. Turn a bike over and crank a pedal like crazy getting the back wheel going really fast and then stop cranking. With no more input the wheel will eventually stop. The system was dead and/or doomed to death when cranking stopped. It was inevitable that the wheel would eventually coast to a stop depending on inertia, bearing attributes, lubrication etc. The wheel will stop with insufficient input.
Man finally developed the means to kill off all (intelligent or otherwise)life on the planet through nuclear bombs, pollution, reduction in arable land area, poisoning the air, water (biosphere in general) destruction of the forests introduction of exotic species where they can wreck havoc on native species upsetting many chains of life (Including food.)
View the earth and its ecosystems as the spinning bicycle wheel, perhaps dead but not coasted to a stop yet. Have we killed our biosphere or sickened it beyond recovery by any means available or just headed in that direction? We don稚 really know! We have never been this way before so there is no historical precedent and man, in general, has a very hard time figuring things out for the first time.
Plenty of people have a hard time learning from their mistakes. More people have a hard time learning from the mistakes of others and precious few figure things out in advance for the first time with no direct previous experience. We have never killed a planet before so we have little direct experience to draw from. I would recommend caution lest we get too close to a slippery slope we can't back up on and slip to our destruction however hard we try to make amends too little too late.
We have the ability to poison ourselves and our planet to death. Have we already done so with the planet inevitably dying irrespective of do gooder efforts? We don't know. By acting promptly and committing appropriate resources could we make a difference or is it too late already? Again, we don't know. Maybe the planet is still inside �he envelope where it can sustain if we don't let things get too far out of balance. Again, we just don't know. The prophets of doom don't know and those whistling in the dark business as usual everything is OK crowd also do not know.
Since we really don't know where we are with respect to the point of no return, you'd hope that prudent persons would encourage a careful analysis of the situation rather than denying the possibility that it is possible for humankind to bring about their own destruction.
Rather than argue about the number of angels dancing on the head of a pin, lets use a microscope and count the buggers. We really don't know where we are along the continuum of self destruction but it seems prudent folks would want to know so as to make rational decisions of what to do if anything rather than just wrap oneself in a protective cloak of ignorant denial.
There is a surplus of vocal fanatics manning the battlements at both extremes of the argument, doing harm through engendering confusion through contradiction and naysaying. One is reminded of the war of the Lilliputians which started with tis, taint, tis taint, tis taint over which end of the boiled egg should be cracked open to spoon out the contents at breakfast.
Science can be complicated and difficult for the well intentioned but ill prepared lay persons to grasp. Nevertheless we need for everyone to try to support scientific efforts to find the truth of the matter in this grave area and be prepared to make amends or take corrective action as answers are found... if change is needed. Making this important debate/inquiry into a religious war where true believers of any stripe, unchecked by knowledge, accept a dogma on faith and cleave to it with maniacal ferocity out of proportion to the strength of their understanding is counterproductive in the extreme.
Blind loyalty to your side with concomitant denial of any information to the contrary and promulgation of this ignorant faith based foolishness serves no good cause. There are insufficient facts to justify many of the absolutist positions being taken. There is altogether too much don't confuse me with the facts, my mind is made up at both extremes of the spectrum.
I hope to have offended extremists of both ends of the continuum equally. If anyone feels shorted, please PM me with details and I shall endeavor to bring your offense quota up to par with the others.
Pat