I.INTRODUCTION
a. Slums are a very bad place to live in because it is a very dirty environment full of trash and the houses aren't built correctly they are really bad constructed.
b. Slums are a really harsh environment to live in, it is a very poor place  
c. Slums have a negative effect because they are very poor and it is just thrown there

II. DEFENDABLE PONT 1
a.  Slums are hell
b. Support Evidence
i: quote
ii: paraphrase
c.Explanation
d. Transition

III. DEFENDABLE POINT 2
a. Slums are so dirty and un healthy
b. Supporting evidence
i: Quote
ii. Paraphrase

VI. DEFENDABLE POINT 3
a. Finally slums are also full of diseases that spread really fast and then everyone gets it.
b. Supporting Evidence
c. Explanation
d. Transition to conclusion

V. Conclusions
a. hook
b. Slums are  a negative effect in the world because they have poor living and housing and it is very dirty and full of diseases it is a very hard life. No one would want to live there 
c. Summarize Arguments
d. leave the reader with the same thing to question about.