Shortcut for adding `org-mode` environment

I'm using org-mode for organizing myself (very useful so far!). However, it is kind of annoying writing #+begin_comment ... #+end_comment each time I'd like to insert an environment. **Question** Is there a shortcut to insert the #+begin_ and #+end_ for a given environment? In the same way C-c C-o comment RET would insert \begin{comment} \end{comment} in latex-mode.