need in 4 hours

In the United States, we are fortunate to have an abundant supply of food. However, this abundance is largely due to advances in agricultural technology, which have in turn created numerous concerns surrounding our food sources. Provide at least two modern examples of how the United States has increased its food production. Using at least two scholarly or reputable resources and your textbook, discuss how these changes have affected the environment, and what impact they have on food safety?