I can tell you haven't read any of the stickys or forum rules.
I'm not gonna lecture you, because we have all been new. But try to research a little more before posting. Use the 'search' tab listed on top of the page.
I just found this thread using the search function
Organic foods vs Conventional foods
Here is another article:
Organic food - Wikipedia, the free encyclopedia
Welcome to EF, and please post responsibly.