Electronic cigarrete cigarette

Next Tuesday I'm going to present a product in my English class. It is an electronic cigarrette cigarette, which doesn't produce smoke, and obviously doesn't contain any dangerous substances for the health. Nowadays, smoking cigarettes is associated with many illnesses as such such as lung cancer and breast cancer. This e-cigarette is an excellent alternative to give up smoking. I think that the principal problem with "normal" cigarettes is that they contain many addictive substances, and for this reasons and others people cann`t stop skoke smoking easily.

"ette" is a suffix meaning "small" or "petite".  So, cigarette is literally "small cigar".  That might help you remember the spelling.

Good luck on your presentation!

Electronic Cigarrette

Next Tuesday I'm going to present a product in to my English class. It's an electronic cigarrette, which that doesn't produce smoke, and obviously doesn't contain any dangerous unhealthy substances for the health. Nowadays, smoking cigarrettes is associated with many illnesses, as such as lung and breast cancer. The e-cigarrette is an excellent alternative to giving up smoking. I think that the principal problem with the "normal" cigarrette is that they it contains many addictive substances, and for this reasons and others people cann`t stop smoking easily.

Very good, just some mistakes with spelling and gerunds.  Also, I noticed a lot of Spanish-speakers confuse "which" with "that".  Here are a couple of websites that describe the distinction:

http://www.quickanddirtytips.com/education/grammar/which-versus-that-0

http://www.getitwriteonline.com/archive/103103whichthat.htm