In many parts of Africa, boys and girls are treated very differently.
In areas where there are water shortages, it's often the girls who have to travel for miles each day to collect supplies, while the boys might go to school.
Girls as young as 10 sometimes have to collect the water for their whole family.
They often carry heavy pots of water, which can damage their necks and back.
This can lead to them having problems later in life.
Girls who go out every morning to get water often can't go to school.