Provide at least two recent (since the green revolution ended) examples of how the united states has increased its food production, and discuss how these changes have affected both the environment and food safety. Possible innovations you might cover include, but are not limited to: gm agriculture, poly culture farming, perm culture farming, vertical farms, small-scale organic farming, aquaponics, concentrated animal feeding operations, urban gardening (rooftop and vacant lot), not-till farming, precision farming, use of drones, and use of gps technology.