Can someone help me out by answering why people laugh at me when I talk about organic foods and how to handle the situation?

I just want to help and inform others of what I have researched about non organic foods, preservatives, GMO's, pesticides, and other harmful ingredients in food. I do not know how to react when they laugh, joke, or just plain out do not listen. This is truly starting to bother me.
Can someone help me out by answering why people laugh at me when I talk about organic foods and how to handle the situation?
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