I am fascinated by the concept of urban agriculture. The idea of food production in an urban setting is cool.
I am also fascinated but I don't like GM food
What concerns you most about GM foods?  Is it that they have had changes made on their DNA, or something?
GM foods causes cancer and other health challenges 
I didn't realize that any link to cancer or other health issues had ever been proven.  To me, genetic modification is just a natural outgrowth of previous efforts with selective breeding.
It provides food for the growing world population but has it's accompanying issues
effect of genetically modified crops on health and the environment, the effect on pesticide resistance, the impact of such crops for farmers, and the role of the crops in feeding the world population. In addition, products derived from GMO organisms play a role in the production of ethanol fuels and pharmaceuticals.
Specific concerns include mixing of genetically modified and non-genetically modified products in the food supply, effects of GMOs on the environment, the rigor of the regulatory process, and consolidation of control of the food supply in companies
unacceptable by Orthodox rabbis or Muslim leaders. However, some Jewish groups dispute this designation.
Food writer Michael Pollan does not oppose eating genetically modified foods, but supports mandatory labeling of GM foods and has criticized the pesticide-heavy monoculture farming enabled by certain GM crops, such as glycosphate-tolerant ("Roundup-ready") corn and soybeans. He has also expressed concerns about biotechnology companies holding the intellectual property of the foods people depend on, and about the effects of the growing corporatization of large-scale agriculture