What are the problems scientists are trying to solve in order to get to Mars? list 5

1: You need to have gravity because having no gravity what it does is it can cause painful Health problems for astronauts.

2: The powerful cosmic radiation comes mostly from our sun which it can damage the electronic equipment on board and which creates health problems for the crew.

3:Water supply

4: Food supply

5: space suit limitation

the exclusive possession or control of the supply or trade in a commodity or service.