Ever wonder where pesticides & herbicides came from in the first place?
At the turn of the century, when plants and factories began producing large amounts of industrial waste they decided to try and make even more money by selling some of it. Nitrogen turned up in many papermill leftovers so that was a start. By the mid 1900's scientists were being urged to find ways to blow stuff up. Guess what TNT is made of? Basically nitrogen and ammonia. That's the secret pipe-bomb formula ammonium nitrate! Just add the secret, easy-to-find ingredient and you have a very powerful explosive. Put another way, WWII bomb makers used their creation to make chemical fertilizers. The destruction continues with our soils...
Pesticides and herbicides. Again, these are the product of scientists working hard for the military. In WWI and II gasses were used to kill people. Do you think they bothered finding a new recipe when farmers complained of an overpopulation of grasshoppers? Just gas 'em. And this has gone on for decades. Wonder how they came up with herbicides? Need multiple choice??? They are mainly derivatives of chemical defoliants (e.g., Agent Orange) used in the Vietnam war.
These elements were created strictly for the purpose of destruction, without regard for long-term side effects on humans or the rest of the ecosystem. Here is an example of these chemicals in action. A farmer sprays a chemical pesticide on his crop. All the bugs die. Isn't that great?! Well, maybe not. Remember, bugs have predators, such as birds. Now pickings are fairly easy, dead bugs being much easier to grab. But wait a second, they are dead due to exposure to poisons so guess what? The bird that eats the poisoned bug will also likely die. Next season, the remaining bugs have no predators and the eggs they laid before they died hatch and also face no predators. The next year there are even more bugs so the farmer sprays more poison. Notice a vicious circle developing here? Soon there are very few birds left anywhere and tons of bugs.