 Our goal is to determine the outcome of competition between methanogenic archaea and electroactive bacteria, because only the latter contribute to both electric current and correlated hydrogen production.
<clarity>  Our goal is to determine the outcome of competition between methanogenic archaea and electroactive bacteria, because only the latter contribute to both electric current and correlated hydrogen production.
 Our goal is to determine the outcome of competition between methanogenic archaea and electroactive bacteria, because only the latter contribute to electric current and correlated hydrogen production.