letter of concern (human cells) - investigate the facts

i need help with the letter of concern! it's due tomorrow :(
she said to investigate and collect FACTS. if i for example wont to write how using human cells is bad thing to do, where i can find FACTS that support my letter.

i also need instructions how to start and finish letter!?!?!

thanks

Well, libraries are great places to conduct research. If you don't have time to wait until the library opens, you will have to rely on the Internet. Google Books is a great source. Try typing in "stem cell research" into the search engine, and you will find a ton of material you can reference. Just click on the titles of any of the books that have a "limited preview." Good luck.