I have tried doing research into 2-4-d, but what I've seen seems anything but balanced and fair: claims that the EPA relies on private, non-peer reviewed research supplied by chemical companies, or tests on rats which, apparently, have genes that de-toxify toxins (which would make toxicity studies on rats pointless). Or, stuff from the EPA or pesticide/herbicide groups that give it glowingly safe reviews.
And the scariest thing of all: Apparently, even with that controversy, 2-4-d is considered one of the safer herbicides.
It also doesn't help that what I've seen on farming forums says that if you can get enough into a dandelion taproot to kill it, then you've got enough to affect grass, flowers, or other plants.
I'm also concerned with the whole "resistant weed" issue of any sort of pesticide/herbicide/antibiotic.
What's the best way to remove dandelions? Is there a good way to choke them out (thyme, apparently, will once it gets established, but that will take 3-4 years and it's not clear that it even can get established if the dandelions are there first).
I have tried to do the research on this, but frankly, I'm now well past anything I can make sense of."