Fertilizer and other agricultural waste pouring into the Gulf of Mexico creates a larger and larger patch of lifeless ocean each year. Finally, the EPA has a plan of attack. Is it enough?
The abbreviation et al. means and others. It is most often used when a work you are citing in your paper has multiple authors. When a work has two authors, cite both names every time the reference occurs in the text.
et al. stands for et alii - means and others, usually used to substitute for the names of non-primary authors (e.g. of a book). Please note that you should use et al. instead of etc. when referring to people. viz. stands for videlicet - means namely or that is to say.