Stop the trash mu_edm
To get people to litter less often and throw their garbage in the garbage can instead, prevent people to empty out their garbage and waste into the ocean so it will stop polluting lakes, rivers, and oceans, think of a way to stop factory's from polluting the air with the smoke coming out of their factory's. These are the biggest problems in city's that are turning the world's city's into a non-inhabitable place and these are ways to stop them from happening.