Oh for pity's sake!
I suppose I must shoulder the blame for the vitriol I loosed here... Yeeesh!
I was not precise enough in my post, about my concerns.
You guys have tremendously good points, but my original concerns (fracking, over logging, weed killers which only permit GMO seeds to grow, corn growing with a pesticide in it's DNA, so one cannot wash it off, -BTW, that substance has been found in human breast milk,- )
These concerns have disappeared midst the muddy water this post has become.
Therefore I'll delete this post in a day or so, leaving this, my explanation, up so anyone interested can see why it's going, til then.
Thanks everyone, for your participation.

Rather than respond to comments individually, I'll post a few thoughts here.
First, I intend to address the vaccine comment.
If one considers only smallpox, even, indeed countless death and suffering has been avoided, certainly vaccines have been a boon.
If there are legitimate qualms regarding them, I think the worries deal with added preservatives, eg. mercury, and whether profit is of more concern to the pharm companies than the safety and/or health of the public. Con't after a while.

Do you have sources to back up this notion?

In my opinion the reason it fails is because humans ARE part of nature. If they try to improve on nature they are forgetting an essential truth. Thus any attemps at "improvement" are doomed to failure. On the other hand, working with nature and understanding our relationship to it allows us to make great progress. This is also possible.

The main problem today, in my opinion, is that there are just too many damn humans on the planet right now. Unless and until we figure out how to manage this, we will face countless challenges from our situation of origin.

We modify and change nature by our very presence. There were mammoths until the 1st humans appeared and European lions until Romans. North America was a truly unique rain forest until European's landed. The change was so dramatic that even when the 1st settlers started moving west, they were 100 years too late to see the change.

There are now 7 billion of us on the planet. We have instigated global warming and fished the oceans to the point that the food chain is expected to totally collapse by 2048. The industrial revolution is behind us. The damage is done. Trying to save nature thru some sort of conservancy now is hundreds or possibly a thousand years too late. We should still try but if we try without taking advantage of the one thing we do well we are fully doomed before we start. Technology is really the one thing we do well and it is our only chance at survival..

As far as "nature" is concerned, we may save it thru modification and survive or we may fail and it will evolve and go right on without us, just as it did before us.

Caution must be our by-word when doing this. The question must not be "Can we do this?" but "Should we do this?"

The elimination of wolves from the American landscape.