hydrogen disulfide
... that in high concentrations, the inorganic compound hydrogen disulfide can cause dizziness, disorientation and ultimately unconsciousness?
... that in high <a href="./Concentration" id="mwFf4" rel="mw:WikiLink" title="Concentration">concentrations</a>, the <a href="./Inorganic_compound" id="mwFf8" rel="mw:WikiLink" title="Inorganic compound">inorganic compound</a> <b id="mwFgA"><a href="./Hydrogen_disulfide" id="mwFgE" rel="mw:WikiLink" title="Hydrogen disulfide">hydrogen disulfide</a></b> can cause <a href="./Dizziness" id="mwFgI" rel="mw:WikiLink" title="Dizziness">dizziness</a>, <a href="./Orientation_(mental)" id="mwFgM" rel="mw:WikiLink" title="Orientation (mental)">disorientation</a> and ultimately <a href="./Unconsciousness" id="mwFgQ" rel="mw:WikiLink" title="Unconsciousness">unconsciousness</a>?