Subscript in Accordion Description?

You can add text CO2 with 2 is bold (then italic), then add this code to Design > Custom CSS

div.accordion-block p strong em {
	font-style: normal;
	font-weight: normal;
	position: relativel;
	top: 5px;
}

If it doesn't work, please share link to page where you added accordion, we can check easier