Well maybe DDT wasn't as bad as they say it was. I heard the studies about bird egg fragility were fraudulent, for example. And perhaps the mosquito born illness it controlled were far worse. I don't know about glyphosate. I used it a few times over the last 12 years on my backyard patio pavers, usually barefoot and sometime some got on my feet, which I washed off when done, anywhere up to 10 to 15 minutes later. But I haven't done that for about five years. I recently had my gardener spray the patio with it. The weeds just come back in a few months anyway.