Why did the north have more deaths than the south during the civil war?

A big reason was that most crops where in the south therefore preventing the north from being able to supply all of their people.

Answer: The Union had better medical care, food and shelter, especially in the war's final years, suggesting that Southern losses to disease were probably much higher. Also, research has shown that soldiers from rural areas were more susceptible to disease and died at a higher rate than city dwellers.

Explanation: I read it on New York Times.