I don't think those nasty nasturtians will be causing cancer any time soon, unlike the carcinogous substances documented in pesticides. (Putting a baby in a greenhouse?....really?) Years ago the pesticide pyrethrin was being sold as an organic and safe alternative to insect control. (I had a feeling there was something wrong because every time I was near it I got a nauseous headache.) It was made out of chrysanthemun leaves which seemed pretty harmless. Studies by the chemical companies touted it as completely safe, -- although the label said it should not be sprayed near water, and MAY harm some beneficial insects. Years later, other studies were done by organizations such as the National Pesticide Telecommunications Network and PANNA, (Pesticide Action Network of North America), that are not funded by chemical companies and have nothing to profit off of a marketed product. They found that it is a neurotoxin that affects water organisms and some beneficial insects. It affects their nervous systems, basically paralyzing them. An example of the dangers of this would be if it is broadly sprayed near a body of water, or the wind happens to blow it there, it affects all water life. All of the organisms, from the larvae of dragonflies and damselflies, crayfish, crabs, frogs, and the larger life forms that eat them. These would be anything from fish, otters, and the beautiful Great Blue Herons that are next on the food chain. I believe we'd be up there on the next rung, eating the fish, shellfish, waterfowl,etc. Other species such as birds, bats, etc. eat the insects that spend their larval form in the water when they emerge in adult form, so they're affected. Etc., Etc., Etc. (Did you know that general bird populations have dropped severely over the past 40 years, according to the bird count done annually during the migration through New York City? ...hmmm...could be a connection here.) The affects of poisons in our environment is taught to kids in elementary school, and helps them to understand how it hurts all of us. I don't think that they'll believe either that they're eating a lot of natural toxins over their lifetime from their salad bowls.
The Native Americans used companion plantings, and were famous for the Three Sisters: corn, pole beans, and squash. The crops were planted with a triangle of corn, pole beans planted next to the corn, and squash in the middle. The pole beans fixed nitrogen in the soil for the corn that's a heavy nitrogen feeder, and the corn provided a stalk for the pole beans. The squash provided ground cover for everyone and attracted pollinators. It worked out very well for all veggies involved, as well as for the Native Americans with high yields. I wonder if the chemical companies have a counter study to try and disprove this too? Probably...Paul, can you find one on that?
Precious little miracles with wings, and an awesome God!