Why do you have to be careful with sources you use?

Is the YMCA a fraternal organization? How can you tell if your daughter is a lesbian with her best friend? What is a clavern? Where does child labor exist why? What are the three different studies on bullying presented at the 1999 annual convention of the American psychological association summarize each study in a few sentences? What would happen to your environment if everyone trash it? What is The Salvation Army's legal name to put in a will? How to act responsibly within the working environment? How can you report someone with an expired student visa? How many workers needs 10000 dairy farm? What are the five major air pollutants regulate by the EPA according to the Clean Air Act? Did the knights of labor allow asians workers? How is Mohammad salahat? How does Weberianism relate to health issues? What is the human environment interaction in Athens? What does human evoirment interation mean? How do you define 'culture'? How can you call about an employer using illegals? Why is renewable energy the best source? Are there female hobos?

Why do you have to be careful with sources you use?