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What is the argument AGAINST GMOs?

My only criticism is that it allows corporations to copyright crop strains and penalize farmers for growing from their own crop without paying.
It terms of production, nutrition and getting resources to struggling populations, GMOs are an absolute win.

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GMOs are modified to resist weed killers like Roundup. So farmers can use herbacides in a widespread fashion without killing the crop

My food being drenched in herbicides does not sit well with me.
@robingoodfellow

Is there demonstrated harm from it though?
Aside from just finding it off-putting...is there evidence to conclude it will hurt you?

Aren't pesticides well regulated and re-entry/harvest intervals well-known?
@Pikachu You sound like Donald Trump, why not go drink a nice glass of round-up and let us know what happens?
@independentone

I'm not sure what you're criticizing...
@Pikachu
https://www.cbsnews.com/news/glyphosate-breakfast-cereal-still-contains-roundup-ingredient-study-finds/

Well here's a link to a CBS news story about glyphosate, an ingredient in Roundup, found in General Mills and Quaker products.
It's hard not to believe the crop is going to be absorbing at least some of this poison through the roots.
@Pikachu eating modified food that has been drenched in round-up can't be all that good for you. Also science chemically altering nutrients in food, just can't be a good thing.
@independentone

It seems like you're guessing at what "can't be a good thing".
Do you have evidence that GMOs are bad in this way
@robingoodfellow

But the pesticide is being used anyway. Surely this is criticism of pesticide, not GMOs?
@Pikachu I consider it a criticism of both. Farmers rely more heavily on herbicides now than pre GMO. The more being used, the higher the chances of it getting into us.
@robingoodfellow

Farmers rely more heavily on herbicides now than pre GMO.

Is that a fact? Or were they using herbicides and pesticides just as much but with reduced yield?
@Pikachu
This is from an NPR article


When it comes to weedkillers, though, the picture gets more murky. For one thing, the effect of GMOs has been different in corn than in soybeans. Farmers who switched to glyphosate-tolerant corn also switched herbicides, and used less total herbicide than farmers did on conventional corn — for a while. In the years since 2007, however, glyphosate-tolerant corn got sprayed with more weedkillers, as measured in kilograms per acre, than corn without that GMO trait.
@robingoodfellow

That makes sense. So are we seeing more glyphosates ending up in the food supply post GMO vs the non-gmo crop?
samueltyler2 · 80-89, M
@Pikachu yes, and it is linked to a bunch of serious health problems.
Murmurs · 31-35, F
@Pikachu It doesn't even matter much whether glyphosates are good or bad for human beings.

They are catastrophically bad for fundamentally and absolutely essential wild life (like pollinating insects) without which there's not much point having a farm in the first place.