1. which of the following advances in food production were attributed to the green revolution of the 1960s and 1970s? 2. which of the following factors contributed to the great famine in ireland in the mid-nineteenth century? 3. what happens to the food supply when food prices are high? 4. which continent has the highest proportion of food-insecure people? 5. what is the most likely effect that a war might have on food security?