VI: There are natural alternatives to chemical pesticides such as lady bugs and certain bacteria.
There are some natural alternatives for only some problems. And just because something is "natural" doesn't mean that it's good for you. Aflatoxin naturally occurs in organic fertilizer, is toxic, and goes through the food chain.
And beware that one solution doesn't create a new problem. The native lady bugs that were around when I was a kid were useful in eating aphids, however the ladybugs didn't populate fast enough or find the aphid infestations. Asian ladybugs were introduced to America because they were better at getting the aphids. Unfortunately, in our farm area they are now an invasive pest. They love to come indoors and they stink like something awful. If you have the native ladybugs that don't stink, good for you. I haven't seen one in the wild in years.
That's mostly because organic foods are not mass produced at the same level as non-organic
Perhaps a "mass produced" solution would be for everyone in the city to urinate and defecate in buckets along with collecting their compost, then drive it out to the farms. Frankly, it still wouldn't be enough organic fertilizer. My relatives wouldn't be able to organic farm if they weren't collecting the natural residue from the surrounding non-organic farms.
But I should clarify, I think we need more alternatives regardless of whether they are labeled "natural" or not. Although we have a better and more diverse diet than our ancestors, I think we rely on too few crops as primary staples. Particularly when native African crops, for example, are ignored in favor of European/American/Asian crops.