<p>Giovanni's big fingers tapped away on his laptop as he typed a 600-word assigned report on the 1815 eruption of Tambora volcano in Indonesia.</p>
<p>Giovanni was into it. His eyes never left the screen and his earphones blocked out the drone of an air conditioner and chatter from a nearby table. Clicking open an encyclopedia on the wireless system, he found geology facts and carried text blocks to weave into his report.</p>