Complex sentence: Many streetwalkers are underage or runaways or homeless or economically distressed--selling sex out of desperation and for reasons of survival; they are at high risk of drug abuse and victimization; and street prostitution has an negative impact on surrounding communities.
Split into simpler sentences: Many streetwalkers are underage or runaways or homeless or economically distressed--selling sex out of desperation and for reasons of survival. They are at high risk of drug abuse and victimization and street prostitution has an negative impact on surrounding communities.