Biocatalysis is used to produce a number of food products.  More than five biilion tons of high fructose corn syrup are produced annually by the action of the immobilized enzyme glucose isomerase of corn-derived glucose.  Emerging technologies are numerous, including enzymes for clarifying or debittering of fruit juices.  
A variety of potentially useful chemicals are obtained by engineered plants. Bioremediation is a green route to biodegradation.