Nothing, the only reason why we use toothpaste is to freshen your breath. You could just not use toothpaste and your teeth would be fine, you just might have some bad breath.
Scurvy and rickets are some health problems caused by lack of nutrition, but I don't know many more.
Some say obesity, but the people who lack self control should be blamed not the food.
Some problems caused by war is loss of life and economic crash.
some of the problems of money includes: lack of measurement of values.
one of the things that caused some of the economic problems would be they had a bad economy and it caused there empire to be overthrown
Yes, in some cases.
some of the problems include... 1. deforestation 2.water polution 3.Lack of food/jobs/water/energy/etc. If the population rapidly increased, we likely wouldn't have the resources to support our larger population.
Lack of Water
Famine poverty child soldiers lack of education prostitution health problems racism
High blood pressure and some panic problems. You could die of problems after heart transplants.
Some people are afraid to face their problems thats why their solution is to run from it
Well, food can go bad and poison you. Food can also start arguments, but that is usually because people are arguing about what kind or how much to have. Lack of food can cause malnutrition, or lack of the right kinds of foods can cause other problems like scurvy or some kinds of chemical or nutritional imbalances. You can be allergic to food, which can cause severe medical problems or even death if you eat that food, or in some cases even if you come near it.