I've been reading a lot about round up weedkiller and I am eating only organic as of late. 
Oh, I see, what about that weedkiller made you decide to go organic?  I know organic farming is a great agricultural alternative that's rapidly growing!
Independent studies are sure it can cause lots of diseases. . There is a standard for organic that is used to label true organic items.
Ah, I see, I've also heard of the standards used in organic farming, such as how they cycle resources and conserve biodiversity. I wonder where in the world is organic farming happening?
Currently the EU, US, Mexico, Canada, Japan require producers to get certified to market a food as organic within their borders.
Interesting. Well, if you like organic food, what's your opinion on genetically modified food? Currently they'res disputes involving consumers, farmers, and governments about the effects of GMO products.
The GMO have round up inside the seed. Seeds are patented so a few can put anyone in jail who tries to start their own farm or reuse seeds. They own the seeds 
They have a pesticide built in? I thought the effect of genetically modified crops are brought on by selective breeding and gene implanting.