Why were the estimated casualties for the americans so high

A big reason for casualties could more than likely be apart of a persons diet, Americans are much more likely to have a unhealthy diet the Europeans and other places because America has more access to fast food and other unhealthy options. That could be a reason casualties are so high in Americans

You could solve them by trying something new that everyone can agree on or make a decision too.

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.