The Aqua-Purifier lowers a <l:6,104>city<e>'s <l:6,124>overcrowding<e> by 2, while giving safe, purified water to the citizens. The <l:6,91>pollution<e> is decreased by 50%, while <l:6,90>food<e> is increased by 25%. It also ensures absolute protection from <l:6,41>Infect City<e> attacks.