What are the three most significant changes in food production in the past 100 years?

Module:  The PastAnswer the following1. What are the three most significant changes in food production in the past 100 years?  Explain.2. Explain how changes in food practices have affected the health of the U.S. population.3. Based on the significant changes in food industry and practices, propose possible solutions to decrease the prevalence of food-related health problems (obesity, diabetes, cardiovascular disease, and cancer) in the U.S.4. In your opinion based on past and current food practices (no need for additional research for this question), what are the trends in the world food supply for the next 50 years?