Welcome to the site mina.
You will find lots of info and opinions here. As you will find most subjects have been covered many times before. To get the most out of the site check out the Knowledge Base and use the search function for quick answers to your questions. There are links to these sections towards and at the top of the page. To use the search function click on the tab and type in the subject you are interested in. Here is a link to what I found by typing "ethanol" in the search function (there are 126 threads where "ethanol" is mentioned):
Glad to have you here and enjoy the site.