Organic foods might in fact be contaminated by dangerous bacteria like E. Coli found in manures and natural techniques of pests control may not totally eradicate pests, thereby leaving remnants of harmful microbes on food. Also, it is possible for small amounts of pesticides and other chemicals in the city air to be suspended on plants. Without preservatives, organic foods have shorter shelf-lives and they are more costly than conventional foods. For the pros, organic foods contain more vitamins and other beneficial nutrients that are readily absorbed into the body quickly than vitamin supplements and non-organics. Organic foods also taste better and it is an innovative hobby to start your own garden as it is good for the environment.